WO2020166632A1 - フルオロラクトン及びその製造方法 - Google Patents
フルオロラクトン及びその製造方法 Download PDFInfo
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- WO2020166632A1 WO2020166632A1 PCT/JP2020/005417 JP2020005417W WO2020166632A1 WO 2020166632 A1 WO2020166632 A1 WO 2020166632A1 JP 2020005417 W JP2020005417 W JP 2020005417W WO 2020166632 A1 WO2020166632 A1 WO 2020166632A1
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- 0 *C1(OC1(F)F)F Chemical compound *C1(OC1(F)F)F 0.000 description 9
- RFJVDJWCXSPUBY-UHFFFAOYSA-N FC(C(C(O1)(F)F)(OC1=C(F)F)F)(F)F Chemical compound FC(C(C(O1)(F)F)(OC1=C(F)F)F)(F)F RFJVDJWCXSPUBY-UHFFFAOYSA-N 0.000 description 1
- IHZQVNJWZLTECJ-UHFFFAOYSA-N O=C(C(C(F)(F)F)(OC1(C(F)(F)F)F)OC1(F)F)F Chemical compound O=C(C(C(F)(F)F)(OC1(C(F)(F)F)F)OC1(F)F)F IHZQVNJWZLTECJ-UHFFFAOYSA-N 0.000 description 1
- CWRPQPNYDDMAMA-UHFFFAOYSA-N O=C(C(C(F)(F)F)(OC1(F)F)F)OC1(C(F)(F)F)F Chemical compound O=C(C(C(F)(F)F)(OC1(F)F)F)OC1(C(F)(F)F)F CWRPQPNYDDMAMA-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
- C07D317/10—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings
- C07D317/32—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D317/42—Halogen atoms or nitro radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D319/00—Heterocyclic compounds containing six-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D319/10—1,4-Dioxanes; Hydrogenated 1,4-dioxanes
- C07D319/12—1,4-Dioxanes; Hydrogenated 1,4-dioxanes not condensed with other rings
Definitions
- the present disclosure relates to fluorolactone, a method for producing the same, and the like.
- 2-(difluoromethylene)-4,4,5-trifluoro-5-(trifluoromethyl)-1,3-dioxolane is used as a fluororesin raw material.
- a method for producing this perfluorodioxolane as shown by the following formula, 3,5,5,6-tetrafluoro-3,6-bis(trifluoromethyl)-1,4-dioxan-2-one
- Patent Document 1 A method of using it as a raw material is known (for example, Patent Document 1).
- Non-Patent Document 1 As a method for producing the perfluorodioxane, for example, a two-step method using hexafluoropropylene oxide as a raw material as shown in the following formula is known (for example, Non-Patent Document 1).
- Perfluorinated dioxolanes 1. Synthesis of some derivatives of perfluoro-4-oxo-1,3-dioxolane”, V. S. Yuminov, S. V. Kartsov, V. L. Maksimov, and A. V. the Academy of Sciences of the USSR, 1988, 37(2),311-315.
- Non-Patent Document 1 The method for producing the perfluorodioxane described in Non-Patent Document 1 requires two steps. It is an object of the present disclosure to provide a method and the like capable of producing a fluorolactone compound from hexafluoropropylene oxide or the like in one step.
- Formula (1) [In the formula, two R 1 s are the same and are a fluorine atom or a fluoroalkyl group. ]
- step E of heating the compound represented by the formula (8) to form a compound represented by the formula (5).
- the compound represented by the formula (6) is reacted with water or an alkyl alcohol to obtain the formula (7):
- R 71 represents a hydrogen atom or an alkyl group, and R 1 has the same meaning as described above.
- Item 7. instead of the steps D and E, Step F of heating the compound represented by the above formula (6) in the presence of a base to produce the compound represented by the above formula (5) Item 5.
- Item 8. Formula (7-1): [In the formula, two R 1 s are the same and are a fluorine atom or a fluoroalkyl group, and R 72 is an alkyl group. ] The compound represented by. Item 9.
- Item 9. The compound according to Item 8, wherein R 72 is a linear or branched C 1-10 alkyl group.
- Item 10. Item 9.
- Formula (5) [In the formula, R 1 is a fluorine atom or a fluoroalkyl group. ] A composition containing a compound represented by: Furthermore, with respect to 100 parts by mass of the compound represented by the formula (5), Formula (9): [In the formula, two R 1 have the same meanings as described above. ] 0.00001 to 1 part by mass of a compound represented by and/or formula (10): [In the formula, two R 1 have the same meanings as described above. ] A composition containing 0.00001 to 1 part by mass of the compound represented by: Item 13.
- the content of the compound represented by the formula (9) is 0.00001 to 0.5 parts by mass
- the content of the compound represented by the formula (10) is 0.00001 to 0.5 part by mass, Item 13.
- a method and the like that can produce a fluorolactone compound from hexafluoropropylene oxide or the like in one step is provided.
- a novel fluorodioxolane compound, a method for producing the same, and the like are provided.
- room temperature can mean a temperature within the range of 10-40°C.
- C n ⁇ m (where n and m are each numbers) means that the number of carbon atoms is n or more and m or less, as is commonly understood by those skilled in the art. It means that.
- hydrocarbon group means a group consisting of carbon and hydrogen. Hydrocarbon groups may also be referred to as hydrocarbyl groups. In the present specification, unless otherwise specified, examples of the “hydrocarbon group” are: (1) an aliphatic hydrocarbon group which may be substituted with one or more aromatic hydrocarbon groups (eg benzyl group), and (2) which may be substituted with one or more aliphatic hydrocarbon groups Includes good aromatic hydrocarbon groups. Aromatic hydrocarbon groups may also be referred to as aryl groups.
- the “aliphatic hydrocarbon group” can have a structure that is linear, branched, or cyclic, or a combination thereof. In the present specification, unless otherwise specified, the “aliphatic hydrocarbon group” may be saturated or unsaturated. In the present specification, unless otherwise specified, the examples of the “aliphatic hydrocarbon group” include an alkyl group, an alkenyl group, an alkynyl group, and a cycloalkyl group.
- alkyl group examples include, for example, methyl, ethyl, propyl (eg: n-propyl, isopropyl), butyl (eg: n-butyl, isobutyl, sec-butyl, tert). -Butyl), pentyl (eg, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl), hexyl, heptyl, octyl, nonyl, and decyl; Examples thereof include alkyl groups having 1 to 10 carbon atoms.
- examples of the “alkenyl group” include linear or branched alkenyl groups having 1 to 10 carbon atoms, and specific examples thereof include vinyl and 1 -Propenyl, isopropenyl, 2-methyl-1-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 2-ethyl-1-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, Includes 4-methyl-3-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, and 5-hexenyl.
- alkynyl group examples include linear or branched alkynyl groups having 2 to 6 carbon atoms, and specific examples thereof include ethynyl, 1 -Propynyl, 2-propynyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3-pentynyl, 4-pentynyl, 1-hexynyl, 2-hexynyl, 3-hexynyl, 4-hexynyl , And 5-hexynyl.
- examples of the “cycloalkyl group” include cycloalkyl groups having 3 to 10 carbon atoms, and specific examples thereof include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, Includes cyclooctyl and adamantyl.
- aromatic hydrocarbon group examples include a C 6-14 aromatic hydrocarbon group (aryl group), and specific examples thereof include Includes phenyl, naphthyl, phenanthryl, anthryl, and pyrenyl.
- examples of the “aromatic hydrocarbon ring” include a C 6-14 aromatic hydrocarbon ring, and specific examples thereof include a benzene ring, a naphthalene ring, an anthracene ring, And a phenanthrene ring.
- fluoroalkyl group means a group in which one or more hydrogen atoms from an alkyl group are substituted with fluorine atoms, and all the hydrogen atoms in the alkyl group are substituted. And perfluoroalkyl groups.
- fluoroalkyl group examples include mono, di or trifluoromethyl, mono, di, tri, tetra or hexafluoroethyl, mono, di, tri, tetra, hexa or heptafluorobutyl, and mono, di, Linear or branched, 1 to 1 carbon atoms such as tri, tetra, hexa, hepta, octa or nonafluorobutyl, mono, di, tri, tetra, hexa, hepta, octa, nona, deca or undecafluoropentyl There may be mentioned 10 fluoroalkyl groups.
- One embodiment of the present disclosure is represented by formula (1): [In the formula, two R 1 s are the same and are a fluorine atom or a fluoroalkyl group. ] Is a method for producing a compound represented by (in some cases, referred to as compound (1) in the present specification).
- the method is represented by the formula (2): [In the formula, R 1 has the same meaning as described above. ]
- R 1 is preferably a fluorine atom or a C 1-10 fluoroalkyl group, more preferably a fluorine atom or a C 1-5 perfluoroalkyl group, still more preferably a fluorine atom or a C 1-3 perfluoroalkyl group. It is a fluoroalkyl group, and particularly preferably a C 1-3 perfluoroalkyl group.
- Suitable specific examples of the compound (2) include hexafluoropropylene oxide, 2,2,3-trifluoro-3-(perfluoroethyl)oxirane, and 2,2,3-trifluoro-3-(perfluoropropyl). ) Including oxirane.
- R 31 , R 32 , and R 33 are the same or different and each is a hydrogen atom or a C 1-5 alkyl group
- R 31 is a hydrogen atom or a C 1-5 alkyl group
- R 32 and R 33 are bonded to each other to form a pyrrolidine ring or piperidine ring which may have 1 or 2 substituents on the carbon atom on the ring.
- the substituents are methyl or ethyl, and when there are more than one, they may be the same or different, or R 31 and R 32 are bonded to have 1 or 2 substituents at the carbon atom on the ring.
- substituents are methyl or ethyl, and when there are plural substituents, they may be the same or different, and R 33 is a hydrogen atom or a C 1-5 alkyl group.
- R 31 , R 32 , and R 33 are the same or different and each is a hydrogen atom or a C 1-3 alkyl group
- R 31 is a hydrogen atom or a C 1-3 alkyl group
- R 32 and R 33 are bonded to form a pyrrolidine ring or a piperidine ring
- R 31 and R 32 are bonded to form a pyrrolidone ring or a piperidinone ring
- R 33 is a hydrogen atom or a C 1-3 alkyl group.
- R 31 , R 32 , and R 33 are the same or different and each is a hydrogen atom or a C 1-3 alkyl group, R 31 is a hydrogen atom or a C 1-3 alkyl group, and R 32 and R 33 are bonded to form a pyrrolidine ring, or R 31 and R 32 are bonded to form a pyrrolidone ring, and R 33 is It is a C 1-3 alkyl group.
- R 31 , R 32 , and R 33 are the same or different and each is a hydrogen atom, methyl, or ethyl, or R 31 is a hydrogen atom, methyl, or ethyl, and R 32 and R 33 are combined to form a pyrrolidine ring, or R 31 and R 32 are combined to form a pyrrolidone ring, and R 33 is It is a hydrogen atom, methyl or ethyl.
- Suitable specific examples of the compound (3-1) include formic acid amide, N,N-dimethylacetamide, N,N-dimethylformamide, N-methyl-2-pyrrolidone, and N-ethyl-2-pyrrolidone.
- R 34 , R 35 , R 36 , and R 37 are the same or different and are a hydrogen atom or a C 1-5 alkyl group, or R 34 and R 35 are the same or different, a hydrogen atom or a C 1 -5 alkyl group, R 36 and R 37 are bonded to each other to form a tetrahydropyrimidine ring or an imidazolidine ring, which may have 1 or 2 substituents at carbon atoms on the ring; The substituent is methyl or ethyl.
- R 34 , R 35 , R 36 , and R 37 are the same or different and are a hydrogen atom or a C 1-3 alkyl group, or R 34 and R 35 are the same or different and are a hydrogen atom or a C 1 It is a -3 alkyl group, and R 36 and R 37 are bonded to each other to form a tetrahydropyrimidine ring or an imidazolidine ring.
- R 34 , R 35 , R 36 and R 37 are the same or different and are a hydrogen atom, methyl or ethyl, or R 34 and R 35 are the same or different and are a hydrogen atom, methyl or ethyl. And R 36 and R 37 are bonded to each other to form a tetrahydropyrimidine ring or an imidazolidine ring.
- R 34 , R 35 , R 36 , and R 37 are the same, methyl or ethyl, or R 34 and R 35 are the same, methyl or ethyl, and R 36 and R 37 are bonded to each other. Form a tetrahydropyrimidine ring.
- Suitable specific examples of the compound (3-2) include N,N'-dimethylpropyleneurea, N,N'-dimethylethyleneurea, and tetramethylurea.
- suitable specific examples of the compound (3) include formic acid amide, N,N-dimethylacetamide, N,N-dimethylformamide, N-methyl-2-pyrrolidone, N-ethyl-2- At least selected from the group consisting of pyrrolidone, N,N'-dimethylpropyleneurea, N,N'-dimethylethyleneurea, tetramethylurea, N,N'-diethylpropyleneurea, and N,N'-diethylethyleneurea It is one compound.
- M is an alkali metal atom and n is 0 or 1, or M is an alkaline earth metal atom and n is 0.
- M is a sodium atom, potassium atom, or cesium atom
- n is 0 or 1
- M is a calcium atom and n is 0.
- M is a potassium atom or a cesium atom
- n is 0 or 1
- M is a calcium atom and n is 0.
- Suitable specific examples of the compound (4-1) include cesium fluoride, potassium hydrogen fluoride, calcium fluoride, sodium fluoride, potassium fluoride, and sodium hydrogen fluoride.
- L is a nitrogen atom or a phosphorus atom and R 41 is the same or different and is a C 1-4 alkyl group.
- L is a nitrogen atom or a phosphorus atom
- R 41 is the same as a linear C 1-4 alkyl group.
- L is a nitrogen atom or a phosphorus atom and R 41 is identically methyl, ethyl or n-butyl.
- Suitable specific examples of the compound (4-2) include tetrabutylammonium fluoride, tetraethylammonium fluoride, tetramethylammonium fluoride, tetrabutylphosphonium fluoride and triethylmethylammonium fluoride.
- the amine salt of hydrofluoric acid is preferably substituted.
- the number of substituents is, for example, 1 to 3, preferably 2 or 3, and more preferably 3. When there are plural substituents, they may be the same or different.
- a C 1-10 alkyl group is preferable, a C 1-5 alkyl group is more preferable, and a C 1-4 alkyl group is particularly preferable.
- Suitable examples of the amine salt of hydrofluoric acid include a hydrofluoric acid salt of tri-C 1-4 alkylamine (the number of HF ⁇ may be any integer of 1 to 7).
- a preferred specific example of the amine salt of hydrofluoric acid is trimethylamine hydrofluoride (the number of HF ⁇ may be any integer of 1 to 7, and is preferably 3, 4, or 5).
- Triethylamine hydrofluoride the number of HF ⁇ may be any integer of 1 to 7, and is preferably 3, 4 or 5).
- the number of substituents is, for example, 1 to 4, preferably 2 to 4, more preferably 3 or 4, and particularly preferably 4. When there are plural substituents, they may be the same or different.
- substituent a C 1-10 alkyl group is preferable, a C 1-5 alkyl group is more preferable, and a C 1-4 alkyl group is particularly preferable.
- ammonium salts of hydrofluoric acid include ammonium fluoride, ammonium hydrogen fluoride, tetra C 1-4 alkyl ammonium fluoride.
- ammonium salt of hydrofluoric acid examples include ammonium fluoride, ammonium hydrogen fluoride, tetramethylammonium fluoride, tetraethylammonium fluoride, and tetrabutylammonium fluoride.
- the nitrogen atom on the imidazolium ring preferably has a substituent.
- the number of substituents is, for example, 1 to 3, preferably 2 or 3, and more preferably 2. When there are plural substituents, they may be the same or different.
- a C 1-10 alkyl group eg, methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl
- cyclohexyl, vinyl or allyl is preferable, and C 1-3 alkyl is particularly preferable. It is a base.
- the pyridinium salt of hydrofluoric acid may be substituted, and the number of substituents is, for example, 1 to 3, preferably 1 or 2. When there are plural substituents, they may be the same or different. As the substituent, a C 1-10 alkyl group is preferable, a C 1-5 alkyl group is more preferable, and a C 1-4 alkyl group is particularly preferable.
- Suitable specific examples of the pyridinium salt of hydrofluoric acid include pyridinium poly(hydrogen fluoride) (the number of HF ⁇ may be any integer of 1 to 9, preferably 1 or 9). To do.
- the phosphonium salt of hydrofluoric acid is preferably substituted, and the number of substituents is, for example, 1 to 4, preferably 3 or 4, and more preferably 4.
- substituents a C 1-10 alkyl group, a phenyl which may have a substituent, or a benzyl which may have a substituent is preferable, a C 1-5 alkyl group is more preferable, and a C 1-4 Alkyl groups are particularly preferred.
- phosphonium salt of hydrofluoric acid examples include tetramethylphosphonium hydrofluoride, tetraethylphosphonium hydrofluoride, tetrapropylphosphonium hydrofluoride, tetrabutylphosphonium hydrofluoride and tetraoctylphosphonium.
- Hydrofluoride Trimethylethylphosphonium hydrofluoride, Triethylmethylphosphonium hydrofluoride, Hexyltrimethylphosphonium hydrofluoride, Trimethyloctylphosphonium hydrofluoride, Triethyl(methoxymethyl)phosphonium fluoride Includes hydroacid salts and triethyl(methoxymethyl)phosphonium hydrofluoride.
- preferable specific examples of the compound (4) include cesium fluoride, potassium hydrogen fluoride, calcium fluoride, sodium fluoride, potassium fluoride, sodium hydrogen fluoride, tetrabutylammonium fluoride.
- Tetraethylammonium fluoride Tetraethylammonium fluoride, tetramethylammonium fluoride, tetrabutylphosphonium fluoride, triethylmethylammonium fluoride, triethylamine trihydrofluoride, triethylamine pentahydrofluoride, triethylamine heptafluoride, pyridinium poly (Hydrogen fluoride), pyridine monohydrofluoride, pyridinium poly(hydrogen fluoride), pyridine 9 hydrofluoride, ammonium hydrogen fluoride, and at least one selected from the group consisting of ammonium fluoride Species fluorine compound.
- organic solvents examples include aromatic solvents, ester solvents, ketone solvents, saturated hydrocarbon solvents, nitrile solvents, ether solvents, sulfoxide solvents, and halogenated hydrocarbon solvents.
- the said organic solvent can be used individually by 1 type or in combination of 2 or more types.
- organic solvents include ether solvents, ester solvents, halogenated hydrocarbon solvents, and nitrile solvents.
- Suitable examples of aromatic solvents include benzene, toluene, and xylene.
- Suitable specific examples of the ester solvent include methyl formate, ethyl formate, methyl acetate, ethyl acetate, isopropyl acetate, methyl propionate, ethyl propionate, and n-butyl acetate.
- Suitable examples of ketone-based solvents include acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone.
- Suitable specific examples of the saturated hydrocarbon solvent include n-pentane, n-hexane, cyclohexane, and n-heptane.
- Suitable specific examples of the nitrile solvent include 1,4-dicyanobutane, acetonitrile and benzonitrile.
- Preferable specific examples of the ether solvent include diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, diethyl ether, diisopropyl ether, dioxane, tetrahydrofuran, and 1,2-dimethoxyethane, crown ether.
- Suitable specific examples of the sulfoxide-based solvent include dimethyl sulfoxide and sulfolane.
- Suitable specific examples of the halogenated hydrocarbon solvent include methylene chloride, chloroform, carbon tetrachloride, 1,2-dichloroethane, 1,2-dichlorobenzene, and chlorobenzene.
- organic solvent examples include ethyl acetate, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,4-dicyanobutane, methylene chloride, chloroform, tetrahydrofuran, and acetonitrile.
- the amount of the compound (3) used in the step A is preferably in the range of 0.05 to 10 mol, more preferably in the range of 0.08 to 5 mol, and further preferably 1 to 1 mol of the compound (2). It may preferably be in the range of 0.1 to 2 mol.
- the amount of the compound (4) used in the step A is preferably in the range of 0.001 to 0.3 mol, and more preferably 0.002 to 0.1 mol, relative to 1 mol of the compound (2). It may be in the range, more preferably in the range of 0.006 to 0.1 mol.
- the amount of organic solvent used in step A can be an amount that can function as a solvent, based on common technical knowledge.
- the amount of the organic solvent used in step A is preferably within the range of 0.1 to 50 mol, more preferably within the range of 0.1 to 20 mol, and further preferably relative to 1 mol of the compound (2). It may be in the range of 0.1 to 10 mol.
- the reaction temperature in step A may be preferably in the range of ⁇ 30 to 40° C., more preferably in the range of ⁇ 30 to 30° C., and further preferably in the range of ⁇ 20 to 30° C.
- a lower reaction temperature in step A tends to improve the selectivity of the compound (1). The higher the reaction temperature in step A, the higher the reactivity tends to be.
- the reaction time in step A is preferably within the range of 0.5 hours to 48 hours, more preferably within the range of 0.5 hours to 24 hours, and further preferably within the range of 0.5 hours to 12 hours. You can
- step A can be carried out in the presence or absence of an inert gas (eg nitrogen gas), and preferably in the absence thereof.
- an inert gas eg nitrogen gas
- Step A can be performed under reduced pressure, atmospheric pressure, or under increased pressure.
- the compound (2) and the compound (3) may be reacted in an organic solvent, preferably, the compound (3), the compound (4) and the organic solvent are mixed and cooled (eg, -30). C.) and compound (2) is added thereto.
- an organic solvent preferably, the compound (3), the compound (4) and the organic solvent are mixed and cooled (eg, -30). C.) and compound (2) is added thereto.
- the compound (1) produced in step A can be isolated or purified, if desired, by a conventional method such as extraction, dissolution, concentration, precipitation, dehydration, adsorption, distillation, rectification, chromatography, or a combination thereof. ..
- Patent Document 1 The method disclosed in Patent Document 1 is difficult and dangerous to handle in the production of 3,5,5,6-tetrafluoro-3,6-bis(trifluoromethyl)-1,4-dioxan-2-one. Fluorine gas is used. Further, according to the method disclosed in Patent Document 1, 3,5,5,6-tetrafluoro-3,6-bis(trifluoromethyl)-1,4-dioxan-2-one is produced as a mixture and is difficult to purify. .. On the other hand, in step A of the present disclosure, it is not necessary to use fluorine gas, and the product liquid obtained in step A is easily purified, and can be purified by, for example, liquid separation.
- the method for producing the compound represented by formula (1) of the present disclosure may further include a step B of performing liquid separation, in addition to the step A.
- the reaction liquid generated in step A may be composed of two layers, an upper liquid layer and a lower liquid layer, one of which contains the compound (1). Therefore, the liquid layer containing the target compound (1) can be easily obtained by separating the reaction liquid.
- the method for isolating the compound (1) from the liquid layer may be a conventional method such as extraction, dissolution, concentration, precipitation, dehydration, adsorption, distillation, rectification, chromatography, or a combination thereof. Since the liquid layer containing the compound (1) obtained in the step B contains few contaminant compounds having a boiling point close to that of the compound (1), the compound (1) can be easily obtained by distilling the liquid layer. ..
- One embodiment of the present disclosure includes formula (5): Formula (5): [In the formula, R 1 is a fluorine atom or a fluoroalkyl group. ] Is a method for producing a compound represented by (in the present specification, sometimes referred to as compound (5)). In this method, the compound represented by the formula (1) produced in the step A or B is heated in the presence of the compound (4) to obtain the formula (6): [In the formula, R 1 has the same meaning as described above.
- a step C for producing a compound represented by the formula may be referred to as compound (6) in the present specification
- the compound represented by the formula (6) is reacted with a base (which may be referred to as a base (d) in the present specification) to give a compound represented by the formula (8):
- a base which may be referred to as a base (d) in the present specification
- R 81 is a group corresponding to the base, and R 1 has the same meaning as described above.
- the step D for producing a compound represented by the formula (8) and the compound represented by the formula (8) in the present specification, sometimes referred to as the compound (8)
- the compound represented by the formula (5) in the present specification, sometimes referred to as the compound (8)
- a step E for producing a compound which is including is
- Compound (8) is a carboxylic acid salt of compound (6) corresponding to the above base.
- R 81 is preferably an alkali metal atom, an alkaline earth metal atom, pyridinium, ammonium or amino optionally substituted with an organic group, more preferably a potassium atom, a sodium atom or ammonium, and particularly preferably Preferably, it is a sodium atom or a potassium atom.
- Step C, Step D, Step E, and Step F are performed by known methods except that the formula (1) produced in Step A or B in Step C is used as a raw material.
- it may be carried out according to the method described in JP-A-2005-002014, US Pat. No. 3,308,107, or US Pat. No. 6,664,431.
- the publication is incorporated herein by reference.
- step C the compound (1) produced in the step A or B is heated in the presence of the compound (4) for isomerization to produce the compound (6).
- step C the compound (1) produced in the step A or B may be isolated and used, or the liquid layer of the reaction solution obtained in the step B containing the compound (1) is used. May be done.
- the amount of the compound (4) used in the step C is preferably within the range of 0.001 to 10 mol, and more preferably within the range of 0.002 to 5.0 mol, relative to 1 mol of the compound (1). , And more preferably in the range of 0.006 to 1.0 mol.
- Step C may preferably be carried out in an organic solvent.
- organic solvent examples and preferable examples of the organic solvent are the same as described above.
- Suitable examples of the organic solvent include diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,4-dicyanobutane, acetonitrile, 1,2-dimethyl ether, tetrahydrofuran, and dimethyl sulfoxide.
- the amount of organic solvent used in step C may be that which can function as a solvent, based on common technical knowledge.
- the reaction temperature in step C may be preferably in the range of 50 to 300°C, more preferably in the range of 50 to 200°C, and further preferably in the range of 100 to 180°C.
- the reaction time in step C may preferably be within the range of 0.5 hours to 60 hours, more preferably within the range of 1 hour to 24 hours, and even more preferably within the range of 2 hours to 24 hours.
- the compound (6) produced in step C can be isolated or purified by a conventional method such as extraction, dissolution, concentration, precipitation, dehydration, adsorption, distillation, rectification, chromatography, or a combination thereof, if desired. ..
- step D compound (6) is reacted with base (d) to form compound (8).
- the compound (8) is a carboxylic acid salt of the compound (6) corresponding to the base (d).
- the base (d) is, for example, (1) an alkali salt or an alkaline earth metal acetate, carbonate, hydrogen carbonate, phosphate, hydrogen phosphate, alkoxide salt, hydroxide salt, hydride salt, It is at least one selected from the group consisting of ammonium salt or amide salt, (2) alkali metal, and (3) amine.
- alkoxide salts include sodium methoxide, sodium ethoxide, sodium butoxide, potassium methoxide, potassium ethoxide, potassium butoxide, lithium methoxide, and lithium ethoxide.
- hydroxide salts include sodium hydroxide, potassium hydroxide, lithium hydroxide, rubidium hydroxide, cesium hydroxide, magnesium hydroxide, calcium hydroxide, and barium hydroxide.
- hydride salts include sodium hydride, potassium hydride, lithium hydride, and calcium hydride.
- alkali metals include sodium, potassium, and lithium.
- amines include aliphatic amines, cycloaliphatic amines, aromatic amines, and heterocyclic amines. The amine may suitably be a tertiary amine.
- the base (d) is preferably at least one selected from the group consisting of sodium methoxide, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, cesium carbonate and ammonia. is there.
- the base (d) is more preferably at least one selected from the group consisting of potassium hydroxide, potassium hydrogen carbonate, potassium carbonate, and sodium carbonate.
- Step D may preferably be carried out in an organic solvent.
- organic solvent examples and preferable examples of the organic solvent are the same as described above.
- Suitable examples of organic solvents include methanol, ethanol, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,4-dicyanobutane, 1,2-dimethyl ether, tetrahydrofuran, and acetonitrile.
- the amount of the base (d) used in step D is preferably in the range of 0.05 to 10 mol, more preferably in the range of 0.1 to 10 mol, and further preferably 1 to 10 mol of the compound (6). It may preferably be in the range of 0.1 to 5 mol.
- the amount of the organic solvent used in step D may be an amount that can function as a solvent based on common technical knowledge.
- the reaction temperature in step D may be preferably in the range of ⁇ 50 to 120° C., more preferably in the range of ⁇ 20 to 100° C., and further preferably in the range of ⁇ 10 to 70° C.
- the reaction time in step D is preferably in the range of 0.1 hour to 24 hours, more preferably in the range of 0.1 hour to 12 hours, and further preferably in the range of 0.1 hour to 6 hours.
- the compound (8) produced in step D can be isolated or purified by a conventional method such as extraction, dissolution, concentration, precipitation, dehydration, adsorption, distillation, rectification, chromatography, or a combination thereof, if desired. ..
- step E the compound (8) is heated and thermally decomposed to generate the compound (5).
- the compound (5) is useful as an intermediate or the like for producing a raw material for a resin material.
- Step E may be carried out in an organic solvent or without solvent.
- the organic solvent examples and preferable examples of the organic solvent are the same as described above.
- Preferable specific examples of the organic solvent include ethyl acetate, butyl acetate, propyl acetate, methyl propionate, ethyl propionate, 1,2-dimethoxyethane, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,4- Includes dicyanobutane, and acetonitrile.
- the amount of the organic solvent used in step E may be an amount that can function as a solvent, based on common general technical knowledge.
- the reaction temperature of step E when a solvent is included, may be preferably in the range of 100 to 400° C., more preferably in the range of 100 to 300° C., and further preferably in the range of 100 to 200° C. ..
- it may be preferably in the range of 100 to 400°C, more preferably in the range of 150 to 400°C, and further preferably in the range of 150 to 350°C.
- the reaction time in step E is preferably in the range of 0.1 hour to 24 hours, more preferably in the range of 0.1 hour to 12 hours, and further preferably in the range of 0.1 hour to 6 hours.
- step E can be carried out in the presence or absence of an inert gas (eg nitrogen gas), and preferably in the absence thereof.
- an inert gas eg nitrogen gas
- Step E can be performed under reduced pressure, atmospheric pressure, or under increased pressure.
- the compound (5) produced in step E can be isolated or purified by a conventional method such as extraction, dissolution, concentration, precipitation, dehydration, adsorption, distillation, rectification, chromatography, or a combination thereof, if desired. ..
- Step D1 for producing a compound represented by the formula (may be referred to as compound (7) in the present specification) and a compound represented by the formula (7) as a base (in the present specification, base (d2 ))) to form a compound represented by the formula (8). including.
- R 71 is preferably a hydrogen atom or a linear or branched C 1-10 alkyl group, more preferably a hydrogen atom or a linear or branched C 1-5 alkyl group, and It is preferably a linear or branched C 1-4 alkyl group, particularly preferably methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, or tert-butyl, and further particularly preferably Preferred is methyl or ethyl.
- step D1 compound (6) is reacted with water or an alkyl alcohol to be converted into a corresponding carboxylic acid or alkyl ester to form compound (7).
- the compound (6) may be isolated, or the product liquid containing the compound (6) produced in the step C may be used as it is.
- the use of the product solution is preferable because it has the advantage that the compound (6) does not need to be purified.
- the alkyl alcohol is preferably a linear or branched C 1-10 alkyl alcohol, more preferably a linear or branched C 1-5 alkyl alcohol, and further preferably a linear or branched chain C 1-10 alkyl alcohol.
- a branched chain C 1-4 alkyl alcohol particularly preferably methanol, ethanol, n-propanol, isopropanol, n-butyl alcohol, sec-butyl alcohol, or tert-butyl alcohol, and further particularly preferably, It is methanol or ethanol.
- the amount of water, alkyl alcohol, or a mixture of water and the alcohol used in step D1 is preferably within the range of 0.1 to 50 mol, and more preferably 0, relative to 1 mol of the compound (6). It may be in the range of 2 to 20 mol, more preferably in the range of 0.5 to 10 mol.
- step D1 other organic solvent may be used in addition to water and the above-mentioned alkyl alcohol.
- the organic solvent examples and preferable examples of the organic solvent are the same as described above.
- Specific examples of the organic solvent include 1,2-dimethoxyethane, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,4-dicyanobutane, and acetonitrile.
- the amount of the organic solvent can be preferably in the range of 0.01 to 50 mol, and more preferably in the range of 0.1 to 50 mol with respect to 1 mol of the compound (6).
- the reaction temperature in step D1 may be preferably in the range of ⁇ 50 to 50° C., more preferably in the range of ⁇ 20 to 30° C., and further preferably in the range of ⁇ 20 to 20° C.
- the reaction time in step D1 is preferably within the range of 0.1 hours to 24 hours, more preferably within the range of 0.1 hours to 12 hours, and further preferably within the range of 0.1 hours to 6 hours. You can
- step D1 can be carried out in the presence or absence of an inert gas (eg nitrogen gas), and preferably in the absence thereof.
- an inert gas eg nitrogen gas
- Step D1 can be performed under reduced pressure, atmospheric pressure, or under increased pressure.
- the compound (7) produced in step D1 can be isolated or purified by a conventional method such as extraction, dissolution, concentration, precipitation, dehydration, adsorption, distillation, rectification, chromatography, or a combination thereof, if desired. ..
- the compound (6) is reacted with the alkyl alcohol to form the compound (7) in the reaction solution, water is added to the reaction solution to recover the resulting organic layer, and the organic layer is distilled to obtain the compound (7).
- 7) is preferable because it can be easily purified.
- step D2 compound (7) is reacted with base (d2) to form compound (8).
- base (d2) the description regarding the details of the base in step D is applied, unless otherwise specified.
- the amount of the base (d2) used in step D2 is preferably within the range of 0.1 to 20 mol, more preferably within the range of 0.5 to 15 mol, relative to 1 mol of the compound (7). More preferably, it may be in the range of 1 to 10 mol.
- Step D2 is preferably carried out in the presence of an organic solvent.
- organic solvent is preferably methanol, ethanol, 1,2-dimethoxyethane, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,4-dicyanobutane, acetonitrile or tetrahydrofuran, which may be used alone. Also, two or more kinds may be mixed and used.
- the reaction temperature in step D2 may be preferably in the range of ⁇ 50 to 120° C., more preferably in the range of ⁇ 20 to 100° C., and further preferably in the range of ⁇ 10 to 70° C.
- the reaction time of step D2 is preferably within the range of 0.1 hours to 24 hours, more preferably within the range of 0.1 hours to 12 hours, and further preferably within the range of 0.1 hours to 6 hours. You can
- step D2 can be carried out in the presence or absence of an inert gas (eg nitrogen gas), and preferably in the absence thereof.
- an inert gas eg nitrogen gas
- the step D2 can be performed under reduced pressure, atmospheric pressure, or increased pressure.
- the compound (8) can be precipitated as a solid in the solvent, and when it is precipitated, the compound (8) can be easily isolated by removing the solvent.
- a method for removing the solvent a known method may be adopted.
- One embodiment of the present disclosure is a method for producing the compound represented by the formula (5), wherein the step D1a in which the liquid produced in the step D1 is purified to obtain the compound represented by the formula (7). Further includes. The purified compound (7) may be subjected to the step D2.
- step D1a the reaction solution produced in step D1 is purified to obtain compound (7).
- Compound (7) can be isolated or purified by a conventional method such as extraction, dissolution, concentration, precipitation, dehydration, adsorption, distillation, rectification or chromatography, or a combination thereof.
- the organic layer in the reaction solution produced in step D1 is purified, and more preferably, the organic layer is purified by distillation to easily obtain the compound (7). In most cases, the organic layer does not contain or contains only a small amount of another substance having a boiling point close to that of the compound (7), and thus is suitable for purification by distillation.
- One embodiment of the present disclosure is a method for producing the compound represented by the formula (5), wherein the compound represented by the formula (6) is replaced with a base (in the present specification) in place of the steps D and E. In the text, it may be referred to as a base (f)) in the presence of a step F of producing a compound represented by the formula (5).
- Step F the compound (6) is heated in the presence of the base (f) to produce the compound represented by the formula (5).
- Step F may be carried out by a known method, for example, according to the method described in US Pat. No. 3,308,107 or US Pat. No. 6,664,431. The publication is incorporated herein by reference.
- the compound (6) may be isolated, or the product liquid containing the compound (6) produced in the step C may be used as it is.
- Use of the product solution is preferable because it has an advantage that the work of purifying the compound (6) is unnecessary.
- step F As for the details of the base (f) in step F, the description about the details of the base in step D is applied unless otherwise specified.
- the base (f) carrier is preferably activated carbon, alkali metal oxides, alkaline earth metal oxides, zinc oxide, aluminum oxide, nickel oxide, or silicon dioxide.
- the base (f) carrier is more preferably at least one selected from the group consisting of alkaline earth metal oxides, aluminum oxide, and silicon dioxide.
- alkali metal oxides include lithium oxide, sodium oxide, potassium oxide, rubidium oxide, and cesium oxide.
- alkaline earth metal oxides include magnesium oxide, calcium oxide, and barium oxide.
- Step F may be carried out in an organic solvent or without solvent.
- the organic solvent examples and preferable examples of the organic solvent are the same as described above.
- Preferable specific examples of the organic solvent include ethyl acetate, propyl acetate, butyl acetate, methyl propionate, ethyl propionate, 1,2-dimethoxyethane, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,4- Includes dicyanobutane, tetrahydrofuran, and acetonitrile.
- the amount of the base (f) used in step F is preferably within the range of 0.1 to 200 mol, more preferably within the range of 0.5 to 100 mol, relative to 1 mol of the compound (6). More preferably, it may be in the range of 1 to 50 mol.
- the amount of the organic solvent used in step F may be an amount that can function as a solvent, based on common general technical knowledge.
- the reaction temperature in step F when a solvent is included, may be preferably in the range of 80 to 400° C., more preferably in the range of 100 to 350° C., and further preferably in the range of 100 to 300° C. .. When it does not contain a solvent, it may be preferably in the range of 100 to 400°C, more preferably in the range of 150 to 400°C, and further preferably in the range of 150 to 350°C.
- the reaction time in step F is preferably within the range of 0.01 hours to 24 hours, more preferably within the range of 0.01 hours to 12 hours, and further preferably within the range of 0.01 hours to 6 hours.
- step F can be carried out in the presence or absence of an inert gas (eg nitrogen gas), and preferably can be carried out in the absence.
- an inert gas eg nitrogen gas
- Step F can be carried out under reduced pressure, atmospheric pressure, or under increased pressure.
- the compound of formula (7-1) [In the formula, two R 1 s are the same and are a fluorine atom or a fluoroalkyl group, and R 72 is an alkyl group. ]
- the compound represented by (may be referred to as compound (7-1) in the present specification) is a novel compound.
- the present disclosure also provides these novel compounds. These novel compounds can be usefully used as starting materials for monomers for producing polymers, intermediates and the like.
- R 72 is preferably a linear or branched C 1-10 alkyl group, more preferably a hydrogen atom or a linear or branched C 1-5 alkyl group.
- R 1 is preferably the same as a fluorine atom or a C 1-10 fluoroalkyl group, and R 72 is a linear or branched C 1-10 alkyl group.
- R 1 is the same as a fluorine atom or a C 1-5 perfluoroalkyl group, and R 72 is a linear or branched C 1-5 alkyl group. is there.
- R 1 is the same as a fluorine atom or a C 1-3 perfluoroalkyl group, and R 72 is a linear or branched C 1-4 alkyl group. is there.
- the present disclosure also provides a method for producing the novel compound (7-1).
- the manufacturing method is The method includes the step D1-1 of reacting the compound represented by the formula (6) with an alkyl alcohol to produce the compound represented by the formula (7-1).
- the compound (6) used in step D1-1 in the method for producing compound (7-1) may be the compound produced in step C in the method for producing compound (5) or the compound (6) produced by a known technique. Good. Other matters in this step are the same as in step D1 in the method for producing compound (5), except that this step does not include an aspect of reacting compound (6) with water.
- the above composition can also be produced.
- the composition may further contain the compound (4-1), a polymerization inhibitor, water, or a polar solvent.
- the amounts of the various components contained in the composition can be adjusted by setting reaction conditions (eg, temperature, time, raw material type and amount, solvent type and amount, catalyst type and amount). Moreover, the amounts of the various components can be adjusted by purification after the production of the compound (5).
- a preferred specific example of the compound (9) is 2,2,3,5,6-pentafluoro-3,6-bis(trifluoromethyl)-5-((1,2,2-trifluorovinyl)oxy). -1,4-dioxane.
- the amount ratio of the compound (9) in the composition is preferably 0.00001 to 1 part by mass, more preferably 0.00001 to 0.8 part by mass, relative to 100 parts by mass of the compound (5).
- the amount is more preferably 0.00001 to 0.5 part by mass, and particularly preferably 0.0001 to 0.1 part by mass.
- a preferred specific example of the compound (10) includes perfluoro-2,4-dimethyl-1,3-dioxolane.
- the amount ratio of the compound (10) in the composition is preferably 0.00001 to 1 part by mass, more preferably 0.00001 to 0.8 part by mass, relative to 100 parts by mass of the compound (5).
- the amount is more preferably 0.00001 to 0.5 part by mass, and particularly preferably 0.0001 to 0.1 part by mass.
- the composition may contain either or both of the compound (9) and the compound (10).
- the compound (9) and the compound (10) With respect to 100 parts by mass of the compound (5), preferably 0.00001 to 0.8 parts by mass of the compound (9) and/or 0.00001 to 0.8 parts by mass of the compound (10), It preferably contains 0.00001 to 0.5 parts by mass of the compound (9) and/or 0.00001 to 0.5 parts by mass of the compound (10), and particularly preferably 0.0001 of the compound (9). To 0.1 part by mass and/or 0.0001 to 0.1 part by mass of the compound (10).
- Suitable examples of polar solvents include alcohol solvents, ether solvents, ester solvents, and nitrile solvents.
- Suitable examples of alcoholic solvents include methanol, ethanol, isopropanol, and tert-butyl alcohol.
- Suitable specific examples of the ester solvent include methyl formate, ethyl formate, methyl acetate, ethyl acetate, isopropyl acetate, methyl propionate, ethyl propionate, and n-butyl acetate.
- Suitable specific examples of the nitrile solvent include 1,4-dicyanobutane, acetonitrile and benzonitrile.
- Suitable specific examples of the ether solvent include diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, diethyl ether, diisopropyl ether, dioxane, tetrahydrofuran, and 1,2-dimethoxyethane.
- Suitable examples of polar solvents include methanol, ethanol, isopropanol, tert-butyl alcohol, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,4-dicyanobutane, acetonitrile, and tetrahydrofuran.
- Suitable examples of the polymerization inhibitor include 4-methoxy-1-naphthol, hydroquinone, hydroquinone methyl ether, dimethyl-t-butylphenol, 2,6-di-tert-butyl-p-cresol, and benzotriazole.
- the amount ratio of the compound (4-1) in the composition is preferably 0.00001 to 0.1 part by mass, more preferably 0.00001 to 0. 08 parts by mass, more preferably 0.00001 to 0.05 parts by mass, and particularly preferably 0.00001 to 0.01 parts by mass.
- the amount ratio of the polar solvent in the composition is preferably 0.00001 to 0.1 part by mass, more preferably 0.00001 to 0.08 part by mass, relative to 100 parts by mass of the compound (5).
- the amount is more preferably 0.00001 to 0.05 parts by mass, and particularly preferably 0.0001 to 0.01 parts by mass.
- the amount ratio of the polymerization inhibitor in the composition is preferably 0.00001 to 1 part by mass, more preferably 0.00001 to 0.8 part by mass, and further 100 parts by mass of the compound (5).
- the amount is preferably 0.00001 to 0.5 part by mass, particularly preferably 0.00001 to 0.1 part by mass.
- the amount ratio of water in the composition is preferably 0.00001 to 0.1 part by mass, more preferably 0.00001 to 0.08 part by mass, and further 100 parts by mass of the compound (5).
- the amount is preferably 0.00001 to 0.05 parts by mass, particularly preferably 0.00001 to 0.01 parts by mass.
- composition of the present disclosure is within the range of the above-mentioned amount ratio, it can be suitably used, for example, as a raw material of a resin material, and is advantageous in terms of production cost of the composition, whereby the final It is also advantageous in terms of product manufacturing cost.
- Example 1 Steps A and B 0.83 g of CsF (2.5 mmol), 9.03 g of DMF (0.12 mol), and 16.6 g of diglyme (0.12 mol) were added to the reactor and cooled to -20°C. 44 g of hexafluoropropylene oxide (0.27 mol) was added to the reactor and stirred for 2 hours. After the hexafluoropropylene oxide disappeared, the reaction solution was recovered. The reaction solution was separated into two layers, an upper layer solution and a lower layer solution. The reaction solution was separated to collect 29 g of the upper layer solution and 40 g of the lower layer solution. The upper layer liquid and the lower layer liquid were analyzed by GC.
- 63 GC% of compound 1a was obtained with a yield of 52%.
- Compound 1a 63 GC%, hexafluoropropylene: 10 GC%, compound 14a: 15 GC% or less, compound 11a(H): 0.1 GC%, CsF: 0.1% or less, compound 15a: 1.0 GC%, (CH 3 ) 2 NCF 2 H: 0.5 GC%, compound 16a: 6.0 GC%, diglyme: 1.0 GC% or less
- % or less as used herein means that the content of each component is in the range of 0.0000095% or more and the% or less of the specifically described numerical value. The same applies to the following examples.
- the CsF content was measured by the NMR method.
- the contents of other components were measured by the GC method.
- Comparative Example 1 Synthesis of compound 1a in two steps 4.27 g DMF (0.06 mol) was added to the reactor and cooled to -27°C. 12 g of hexafluoropropylene oxide (0.07 mol) was added to the reactor and stirred for 1 hour. After stirring, the reaction solution was recovered. The reaction solution was analyzed by NMR. 4-fluoro-5-oxo-2,4-bis(trifluoromethyl)-1,3-dioxolane-2-carbonyl fluoride, which was the precursor of the desired product, was obtained in a yield of 5%. The second step was not performed because the yield of precursor was very low.
- Example 2 Process C 20 g of the lower layer liquid (containing 13 g of compound 1a) obtained in the same manner as in Example 1, 3.2 g of CsF (21 mmol), and 7.1 g of diglyme (53 mmol) were added to the reactor at 120° C. for 12 hours. It heated and the reaction liquid was obtained. As for the reaction liquid, the upper layer liquid and the lower layer liquid were analyzed by GC. 7.2 g of compound 6a was obtained with a purity of 74%.
- Example 3 Process D The lower layer liquid containing 7.2 g of the compound 6a obtained in Example 2 was added to 12.7 g of potassium carbonate (0.09 mol) and 28 g of dimethoxyethane (0.3 mol), and the mixture was stirred at 60° C. for 2 hours for reaction. A liquid was obtained. The reaction solution was filtered to obtain a filtrate, and the filtrate was concentrated. When analyzed by NMR, a concentrate containing 7.0 g of the compound 8a was obtained (yield 44%).
- Compound 8a 80%, Compound 14c: 3.0% or less, Compound 11a(H): 0.1%, CsF: 1.0% or less, KF: 1.0% or less, Compound 15c: 0.1%, Water: 0.1% or less, diglyme: 10% or less
- the water content was measured by the Karl Fischer coulometric titration method. The contents of other components were measured by the NMR method.
- Example 4 Process E 6.7 g of compound 8a obtained in Example 3 was added to the reactor and heated at 200° C. for 4 hours and 300° C. for 1 hour. The product was collected in a trap at -78°C and analyzed by NMR and GC to obtain compound 5a in a yield of 60% and a purity of 95%.
- Compound 5a 95 GC%, hexafluoropropylene: 0.01 GC%, compound 9a: 1.0 GC% or less, compound 11a(H): 0.1 GC%, compound 11b(Me): 0.1 GC%, compound 12a:0 .1 GC%, CsF: 0.1% or less, KF: 0.1% or less, compound 13a: 0.1 GC%, compound 10a: 0.2 GC% or less, diglyme: 4.0 GC% or less, water: 0.1 %Less than The content of CsF and KF was measured by the ion chromatography method.
- Example 5 Process D1 To 83 g of the upper layer solution and 79 g of the lower layer solution obtained in the same manner as in Example 2, 32 g (1 mol) of methanol and 45 g of water were added and stirred for 2 hours. The product liquid was separated into two layers, and the lower layer liquid was collected by liquid separation and distilled (150° C., 5 hours) to obtain compound 7a. The yield was 47%.
- Example 6 Process D2 To 42 g of methanol was added 0.13 mol of potassium hydroxide. This methanol solution was added to a glass reactor. 0.13 mol of compound 7a was gradually added to this methanol solution, and the mixture was stirred at 20° C. for 1 hour. The solvent was distilled off from the reaction solution with a concentrator, and the produced solid was recovered. This solid was dried under reduced pressure to obtain a stoichiometric amount of compound 8a.
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Abstract
Description
このパーフルオロジオキソランを製造する方法としては、次式に示すような、3,5,5,6-テトラフルオロ-3,6-ビス(トリフルオロメチル)-1,4-ジオキサン-2-オンを原料とする方法が知られている(例えば、特許文献1)。
本開示は、ヘキサフルオロプロピレンオキシド等から1工程でフルオロラクトン化合物を製造できる方法等を提供することを目的とする。
項1.
式(1):
で表される化合物の製造方法であって、
式(2):
で表される化合物と、
式(3-1):
R31、R32、及びR33は、同一又は異なって、水素原子又はC1-10アルキル基であるか、或いは2つが互いに結合して、1個以上の置換基を有していてもよい環を形成していてもよい。]
で表される化合物
及び
式(3-2):
で表される化合物
からなる群から選択される少なくとも1種の化合物(3)とを、
式(4-1):
MHnFm (4-1)
[式中、Mは金属原子であり、nは0又は1であり、Mの原子価数とnの和はmである。]
で表される化合物、
式(4-2):
LR41 4F (4-2)
[式中、Lは窒素原子又はリン原子であり、R41は、同一又は異なって、C1-5アルキル基である。]
で表される化合物、及び
フッ酸又はその塩
からなる群から選択される少なくとも1種のフッ素化合物(4)
並びに
有機溶媒(当該有機溶媒からは、前記式(3-1)で表される化合物及び式(3-2)で表される化合物は除外される。)の存在下に反応させる工程A
を含む製造方法。
項2.
2つのR1は、同一に、C1-10フルオロアルキル基である、項1に記載の製造方法。
項3.
前記工程Aが上液層及び下液層が生成する工程であって、分液する工程Bをさらに含む、項1又は2に記載の製造方法。
項4.
式(5):
で表される化合物の製造方法であって、
前記工程A又はBで生成した式(1):
で表される化合物を、
式(4-1):
MHnFm (4-1)
[式中、Mは金属原子であり、nは0又は1であり、Mの原子価数とnの和はmである。]
で表される化合物、
式(4-2):
LR41 4F (4-2)
[式中、Lは窒素原子又はリン原子であり、R41は、同一又は異なって、C1-5アルキル基である。]
で表される化合物、及び
フッ酸又はその塩
からなる群から選択される少なくとも1種のフッ素化合物(4)
の存在下に加熱して
式(6):
で表される化合物を生成させる工程C、
該式(6)で表される化合物を塩基と反応させて式(8):
で表される化合物を生成させる工程D、及び
該式(8)で表される化合物を加熱して前記式(5)で表される化合物を生成させる工程E
を含む、方法。
項5.
前記工程Dに代えて、
前記式(6)で表される化合物を水又はアルキルアルコールと反応させて式(7):
で表される化合物を生成させる工程D1、及び
該式(7)で表される化合物を塩基と反応させて前記式(8)で表される化合物を生成させる工程D2
を含む、項4に記載の方法。
項6.
前記工程D1において生成した液を精製して前記式(7)で表される化合物を得る工程D1aをさらに含む、項5に記載の製造方法。
項7.
前記工程D及び工程Eに代えて、
前記式(6)で表される化合物を塩基の存在下に加熱して前記式(5)で表される化合物を生成する工程F
を含む、項4に記載の方法。
項8.
式(7-1):
で表される化合物。
項9.
R72が直鎖又は分岐鎖状のC1-10アルキル基である項8に記載の化合物。
項10.
R72がメチル、エチル、n-プロピル、イソプロピル、n-ブチル、sec-ブチル、又はtert-ブチルである項8に記載の化合物。
項11.
式(6):
で表される化合物をアルキルアルコールと反応させ式(7-1):
で表される化合物を生成させる工程D1-1を含む、
項8に記載の化合物の製造方法。
項12.
式(5):
で表される化合物を含有する組成物であって、
さらに、式(5)で表される化合物100質量部に対して、
式(9):
で表される化合物を0.00001~1質量部、及び/又は
式(10):
で表される化合物を0.00001~1質量部
含有する組成物。
項13.
前記式(5)で表される化合物100質量部に対して、
前記式(9)で表される化合物の含有量が0.00001~0.5質量部であり、
前記式(10)で表される化合物の含有量が0.00001~0.5質量部である、
項12に記載の組成物。
本開示の後記説明は、実例の実施形態をより具体的に例示する。
本開示のいくつかの箇所では、例示を通してガイダンスが提供され、及びこの例示は、様々な組み合わせにおいて使用できる。
それぞれの場合において、例示の群は、非排他的な、及び代表的な群として機能できる。
本明細書で引用した全ての刊行物、特許及び特許出願はそのまま引用により本明細書に組み入れられる。
本明細書中の記号及び略号は、特に限定のない限り、本明細書の文脈に沿い、本開示が属する技術分野において通常用いられる意味に理解できる。
本明細書中、室温は、10~40℃の範囲内の温度を意味することができる。
本明細書中、特に断りのない限り、「有機基」は、
(1)炭化水素基、及び
(2)1個以上のヘテロ原子(例:窒素、酸素、硫黄、リン、ハロゲン)を有する炭化水素基
を包含する。
本明細書中、特に断りのない限り、「炭化水素基」の例は、
(1)1個以上の芳香族炭化水素基で置換されていてもよい脂肪族炭化水素基(例:ベンジル基)、及び
(2)1個以上の脂肪族炭化水素基で置換されていてもよい芳香族炭化水素基
を包含する。芳香族炭化水素基は、アリール基とも称され得る。
本明細書中、特に断りのない限り、当該「脂肪族炭化水素基」は、飽和又は不飽和であることができる。
本明細書中、特に断りのない限り、当該「脂肪族炭化水素基」の例は、アルキル基、アルケニル基、アルキニル基、及びシクロアルキル基を包含する。
その具体例は、ビニル、1-プロペニル、イソプロペニル、2-メチル-1-プロペニル、1-ブテニル、2-ブテニル、3-ブテニル、2-エチル-1-ブテニル、1-ペンテニル、2-ペンテニル、3-ペンテニル、4-ペンテニル、4-メチル-3-ペンテニル、1-ヘキセニル、2-ヘキセニル、3-ヘキセニル、4-ヘキセニル、及び5-ヘキセニルを包含する。
その具体例は、エチニル、1-プロピニル、2-プロピニル、1-ブチニル、2-ブチニル、3-ブチニル、1-ペンチニル、2-ペンチニル、3-ペンチニル、4-ペンチニル、1-ヘキシニル、2-ヘキシニル、3-ヘキシニル、4-ヘキシニル、及び5-ヘキシニルを包含する。
その具体例はシクロプロピル、シクロブチル、シクロペンチル、シクロヘキシル、シクロヘプチル、シクロオクチル、及びアダマンチルを包含する。
その具体例は、フェニル、ナフチル、フェナンスリル、アンスリル、及びピレニルを包含する。
その具体例は、ベンゼン環、ナフタレン環、アントラセン環、及びフェナントレン環を包含する。
本開示の一実施態様は、式(1):
で表される化合物(本明細書中、化合物(1)と称する場合がある。)の製造方法である。
で表される化合物(本明細書中、化合物(2)と称する場合がある。)と、
式(3-1):
R31、R32、及びR33は、同一又は異なって、水素原子又はC1-10アルキル基であるか、或いは2つが互いに結合して、1個以上の置換基を有していてもよい環を形成していてもよい。]
で表される化合物(本明細書中、化合物(3-1)と称する場合がある。)
及び
式(3-2):
で表される化合物(本明細書中、化合物(3-2)と称する場合がある。)
からなる群から選択される少なくとも1種の化合物(3)(本明細書中、化合物(3)と称する場合がある。)とを、
式(4-1):
MHnFm (4-1)
[式中、Mは金属原子であり、nは0又は1であり、Mの原子価数とnの和はmである。]
で表される化合物(本明細書中、化合物(4-1)と称する場合がある。)、
式(4-2):
LR41 4F (4-2)
[式中、Lは窒素原子又はリン原子であり、R41は、同一又は異なって、C1-5アルキル基である。]
で表される化合物(本明細書中、化合物(4-2)と称する場合がある。)、及び
フッ酸又はその塩
からなる群から選択される少なくとも1種のフッ素化合物(4)(本明細書中、化合物(4)と称する場合がある。)
並びに
有機溶媒(当該有機溶媒からは、前記式(3-1)で表される化合物及び式(3-2)で表される化合物は除外される。)の存在下に反応させる工程Aを含む。
R31、R32、及びR33は、同一又は異なって、水素原子又はC1-5アルキル基であるか、
R31が水素原子又はC1-5アルキル基であり、R32及びR33が結合して、環上の炭素原子において1又は2個の置換基を有してもよいピロリジン環又はピペリジン環を形成し、当該置換基はメチル又はエチルであり複数ある場合は同一でも異なってもよく、或いは
R31及びR32が結合して、環上の炭素原子において1又は2個の置換基を有してもよいピロリドン環又はピペリジノン環を形成し、当該置換基はメチル又はエチルであり複数ある場合は同一でも異なってもよく、R33が水素原子又はC1-5アルキル基である。
R31、R32、及びR33は、同一又は異なって、水素原子又はC1-3アルキル基であるか、
R31が水素原子又はC1-3アルキル基であり、R32及びR33が結合してピロリジン環又はピペリジン環を形成するか、或いは
R31及びR32が結合してピロリドン環又はピペリジノン環を形成し、R33が水素原子又はC1-3アルキル基である。
R31、R32、及びR33は、同一又は異なって、水素原子又はC1-3アルキル基であるか、
R31が水素原子又はC1-3アルキル基であり、R32及びR33が結合してピロリジン環を形成するか、或いは
R31及びR32が結合してピロリドン環を形成し、R33がC1-3アルキル基である。
R31、R32、及びR33は、同一又は異なって、水素原子、メチル、又はエチルであるか、
R31が水素原子、メチル、又はエチルであり、R32及びR33が結合してピロリジン環を形成するか、或いは
R31及びR32が結合してピロリドン環を形成しており、R33が水素原子、メチル、又はエチルである。
R34、R35、R36、及びR37は、同一又は異なって、水素原子又はC1-5アルキル基であるか、或いは
R34及びR35は、同一又は異なって、水素原子又はC1-5アルキル基であり、R36とR37とは互いに結合して、環上の炭素原子において1又は2個の置換基を有してもよい、テトラヒドロピリミジン環又はイミダゾリジン環を形成し、当該置換基は、メチル又はエチルである。
R34、R35、R36、及びR37は、同一又は異なって、水素原子又はC1-3アルキル基であるか、或いは
R34及びR35は、同一又は異なって、水素原子又はC1-3アルキル基であり、R36とR37とは互いに結合して、テトラヒドロピリミジン環又はイミダゾリジン環を形成する。
R34、R35、R36、及びR37は、同一又は異なって、水素原子、メチル、又はエチルであるか、或いは
R34及びR35は、同一又は異なって、水素原子、メチル、又はエチルであり、R36とR37とは互いに結合して、テトラヒドロピリミジン環又はイミダゾリジン環を形成する。
R34、R35、R36、及びR37は、同一に、メチル又はエチルであるか、或いはR34及びR35は、同一に、メチル又はエチルであり、R36及びR37は互いに結合して、テトラヒドロピリミジン環を形成する。
エステル系溶媒の好適な具体例は、蟻酸メチル、蟻酸エチル、酢酸メチル、酢酸エチル、酢酸イソプロピル、プロピオン酸メチル、プロピオン酸エチル、及び酢酸n-ブチルを包含する。
ケトン系溶媒の好適な具体例は、アセトン、メチルエチルケトン、メチルイソブチルケトン、及びシクロヘキサノンを包含する。
飽和炭化水素系溶媒の好適な具体例は、n-ペンタン、n-ヘキサン、シクロヘキサン、及びn-ヘプタンを包含する。
ニトリル系溶媒の好適な具体例は、1,4-ジシアノブタン、アセトニトリル及びベンゾニトリルを包含する。
エーテル系溶媒の好適な具体例は、ジエチレングリコールジメチルエーテル、トリエチレングリコールジメチルエーテル、テトラエチレングリコールジメチルエーテル、ジエチルエーテル、ジイソプロピルエーテル、ジオキサン、テトラヒドロフラン、及び1,2-ジメトキシエタン、クラウンエーテルを包含する。
スルホキシド系溶媒の好適な具体例は、ジメチルスルホキシド及びスルホランを包含する。
ハロゲン化炭化水素系溶媒の好適な具体例は、塩化メチレン、クロロホルム、四塩化炭素、1,2-ジクロロエタン、1,2-ジクロロベンゼン、及びクロロベンゼンを包含する。
工程Aに用いる化合物(3)の量は、化合物(2)の1モルに対して、好ましくは、0.05~10モルの範囲内、より好ましくは0.08~5モルの範囲内、さらに好ましくは0.1~2モルの範囲内であってよい。
本開示の式(1)で表される化合物の製造方法は、工程Aに加え、分液する工程Bをさらに含んでよい。工程Aで生成する反応液は、上液層と下液層との2層で構成され得、一方の層には化合物(1)が含まれる。このため、当該反応液を分液することで目的とする化合物(1)を含む液層を簡便に取得できる。
本開示の一実施態様は、式(5):
式(5):
で表される化合物(本明細書中、化合物(5)と称する場合がある。)の製造方法である。
当該方法は、前記工程A又はBで生成した前記式(1)で表される化合物を前記化合物(4)の存在下に加熱して式(6):
で表される化合物(本明細書中、化合物(6)と称する場合がある。)を生成させる工程C、
該式(6)で表される化合物を塩基(本明細書中、塩基(d)と称する場合がある。)と反応させて式(8):
で表される化合物を生成させる工程D、及び
該式(8)で表される化合物(本明細書中、化合物(8)と称する場合がある。)を加熱して前記式(5)で表される化合物を生成させる工程E、
を含む。
R81は、好ましくは、アルカリ金属原子、アルカリ土類金属原子、ピリジニウム、アンモニウム、有機基で置換されていてもよいアミノであり、より好ましくは、カリウム原子、ナトリウム原子、又はアンモニウムであり、特に好ましくは、ナトリウム原子又はカリウム原子である。
工程Cでは、前記工程A又はBで生成した化合物(1)を化合物(4)の存在下に加熱して異性化し、化合物(6)を生成させる。
工程Cにおいて、前記工程A又はBで生成した化合物(1)は、単離されて使用されてもよいし、又は化合物(1)を含む前記工程Bで取得された反応液の液層を使用されてもよい。
工程Cに用いる化合物(4)の量は、化合物(1)の1モルに対して、好ましくは、0.001~10モルの範囲内、より好ましくは0.002~5.0モルの範囲内、さらに好ましくは0.006~1.0モルの範囲内であってよい。
工程Dでは、化合物(6)を、塩基(d)と反応させて、化合物(8)を生成させる。化合物(8)は、当該塩基(d)に対応する、化合物(6)のカルボン酸塩である。
アルコキシド塩の例は、ナトリウムメトキシド、ナトリウムエトキシド、ナトリウムブトキシド、カリウムメトキシド、カリウムエトキシド、カリウムブトキシド、リチウムメトキシド、及びリチウムエトキシドを包含する。
水酸化物塩の例は、水酸化ナトリウム、水酸化カリウム、水酸化リチウム、水酸化ルビジウム、水酸化セシウム、水酸化マグネシウム、水酸化カルシウム、及び水酸化バリウムを包含する。
水素化物塩の例は、水素化ナトリウム、水素化カリウム、水素化リチウム、及び水素化カルシウムを包含する。
アルカリ金属の例は、ナトリウム、カリウム、及びリチウムを包含する。
アミンの例は、脂肪族アミン、脂環式アミン、芳香族アミン、及び複素環式アミンを包含する。当該アミンは、好適に、第三級アミンであることができる。
塩基(d)は、より好ましくは、水酸化カリウム、炭酸水素カリウム、炭酸カリウム、及び炭酸ナトリウムからなる群より選択される少なくとも1種である。
工程Eでは、化合物(8)を加熱し、熱分解することにより化合物(5)を生成させる。化合物(5)は、樹脂材料の原料を製造するための中間体等として有用である。
前記工程Dに代えて、
前記式(6)で表される化合物を水又はアルキルアルコールと反応させて式(7):
で表される化合物(本明細書中、化合物(7)と称する場合がある。)を生成させる工程D1、及び
該式(7)で表される化合物を塩基(本明細書中、塩基(d2)と称する場合がある。)と反応させて前記式(8)で表される化合物を生成させる工程D2
を含む。
工程D1では、化合物(6)を、水又はアルキルアルコールと反応させて、対応するカルボン酸又はアルキルエステルに転換し、化合物(7)を生成させる。
工程D2では、化合物(7)を塩基(d2)と反応させて化合物(8)を生成させる。 工程D2における塩基(d2)の詳細は、特に断りのない限り、工程Dにおける塩基の詳細に関する記載が適用される。
有機溶媒は、好ましくは、メタノール、エタノール、1,2-ジメトキシエタン、ジエチレングリコールジメチルエーテル、トリエチレングリコールジメチルエーテル、テトラエチレングリコールジメチルエーテル、1,4-ジシアノブタン、アセトニトリル又はテトラヒドロフランであり、1種単独で用いても2種以上混合して用いてもよい。
工程D1aでは、工程D1で生成する反応液を精製して化合物(7)を得る。化合物(7)は、抽出、溶解、濃縮、析出、脱水、吸着、蒸留、精留、クロマトグラフィー等の慣用の方法、又はこれらの組み合わせにより単離、又は精製できる。好ましくは、工程D1で生成する反応液中の有機層を精製し、より好ましくは当該有機層を蒸留により精製して簡便に化合物(7)を得る。当該有機層は多くの場合、化合物(7)の沸点近傍の沸点を有する他の物質が含まれないか少量しか含まれないため、蒸留による精製に適している。
工程Fでは、化合物(6)を塩基(f)の存在下に加熱して前記式(5)で表される化合物を生成させる。工程Fは、公知の方法で実施してもよく、例えば、米国特許第3308107号明細書、又は米国特許第6664431号明細書に記載の方法に準じて実施してもよい。当該公報は、引用により本明細書に組み入れられる。
塩基(f)は、さらに好ましくは、水酸化カリウム、炭酸水素カリウム、炭酸カリウム、炭酸ナトリウム、フッ化カリウム、フッ化ナトリウム、フッ化セシウム、塩化ナトリウム、及びヨウ化カリウムからなる群より選択される少なくとも1種である。
塩基(f)の担体は、より好ましくはアルカリ土類金属酸化物、酸化アルミニウム、及び二酸化ケイ素からなる群より選択される少なくとも1種である。
アルカリ金属酸化物の具体的な例は、酸化リチウム、酸化ナトリウム、酸化カリウム、酸化ルビジウム、及び酸化セシウムを包含する。
アルカリ土類金属酸化物の具体的な例は、酸化マグネシウム、酸化カルシウム、及び酸化バリウムを包含する。
本開示の製造方法で製造可能な化合物のうち、式(7-1):
で表される化合物(本明細書中、化合物(7-1)と称する場合がある。)は新規化合物である。本開示はこれらの新規化合物もまた、提供する。これらの新規化合物は、ポリマー製造用のモノマーの原料、中間体などとして、有用に使用され得る。
化合物(7-1)は、より好ましくは、R1が、同一に、フッ素原子又はC1-5パーフルオロアルキル基であり、R72が直鎖又は分岐鎖状のC1-5アルキル基である。
化合物(7-1)は、さらに好ましくは、R1が、同一に、フッ素原子又はC1-3パーフルオロアルキル基であり、R72が直鎖又は分岐鎖状のC1-4アルキル基である。
化合物(7-1)は、特に好ましくは、R1が、同一に、C1-3パーフルオロアルキル基であり、R72がメチル、エチル、n-プロピル、イソプロピル、n-ブチル、sec-ブチル、又はtert-ブチルである。
化合物(7-1)は、さらに特に好ましくは、R1が、同一に、C1-3パーフルオロアルキル基であり、R72がメチル又はエチルである。
本開示は、新規化合物(7-1)の製造方法も提供する。当該製造方法は、
前記式(6)で表される化合物をアルキルアルコールと反応させて前記式(7-1)で表される化合物を生成させる工程D1-1を含む。
本開示の一実施形態は、前記式(5)で表される化合物を含有する組成物であって、さらに、式(5)で表される化合物100質量部に対して、
式(9):
で表される化合物(本明細書中、化合物(9)と称する場合がある。)を0.00001~1質量部、及び/又は
式(10):
で表される化合物(本明細書中、化合物(10)と称する場合がある。)を0.00001~1質量部
含有する組成物、である。
前記組成物に含有される前記の各種成分の量は、反応条件(例:温度、時間、原料種及び量、溶媒種及び量、触媒種及び量)を設定することにより調整し得る。また、当該各種成分の量は、化合物(5)の生成後の精製により調整し得る。
前記組成物における化合物(9)の量比は、化合物(5)の100質量部に対して、好ましくは、0.00001~1質量部、より好ましくは、0.00001~0.8質量部、さらに好ましくは、0.00001~0.5質量部、特に好ましくは、0.0001~0.1質量部である。
前記組成物における化合物(10)の量比は、化合物(5)の100質量部に対して、好ましくは、0.00001~1質量部、より好ましくは、0.00001~0.8質量部、さらに好ましくは、0.00001~0.5質量部、特に好ましくは、0.0001~0.1質量部である。
アルコール系溶媒の好適な具体例は、メタノール、エタノール、イソプロパノール、及びtert-ブチルアルコールを包含する。
エステル系溶媒の好適な具体例は、蟻酸メチル、蟻酸エチル、酢酸メチル、酢酸エチル、酢酸イソプロピル、プロピオン酸メチル、プロピオン酸エチル、及び酢酸n-ブチルを包含する。
ニトリル系溶媒の好適な具体例は、1,4-ジシアノブタン、アセトニトリル及びベンゾニトリルを包含する。
エーテル系溶媒の好適な具体例は、ジエチレングリコールジメチルエーテル、トリエチレングリコールジメチルエーテル、テトラエチレングリコールジメチルエーテル、ジエチルエーテル、ジイソプロピルエーテル、ジオキサン、テトラヒドロフラン、及び1,2-ジメトキシエタンを包含する。
CsF:フッ化セシウム
GC:ガスクロマトグラフィー
DMF:N,N-ジメチルホルムアミド
ジグライム:ジエチレングリコールジメチルエーテル
Me:メチル
化合物1a:次式(1a)で表される化合物
CF2=CFOCF2CF2CF3 (13a)
化合物7a:次式(7a)で表される化合物
CF3CF2CF2OCFCF3COF (15a)
化合物15b:次式(15b)で表される化合物
CF3CF2CF2OCFCF3COOMe (15b)
化合物15c:次式(15c)で表される化合物
CF3CF2CF2OCFCF3COOK (15c)
化合物16a:次式(16a)で表される化合物
0.83gのCsF(2.5mmol)、9.03gのDMF(0.12mol)、及び16.6gのジグライム(0.12mol)を反応器に加え-20℃に冷却した。前記反応器に44gの6フッ化プロピレンオキシド(0.27mol)を加え2時間撹拌した。6フッ化プロピレンオキシドが消失したのち、反応液を回収した。反応液は上層液と下層液の2層に分離していた。反応液を分液し上層液29gと下層液40gを各々回収した。上層液と下層液をGCで分析した。63GC%の化合物1aを収率52%で得た。
化合物1a:63GC%、ヘキサフルオロプロピレン:10GC%、化合物14a:15GC%以下、化合物11a(H):0.1GC%、CsF:0.1%以下、化合物15a:1.0GC%、(CH3)2NCF2H:0.5GC%、化合物16a:6.0GC%、ジグライム:1.0GC%以下
なお、ここで「%以下」とは、各種成分の含有量が、0.0000095%以上、且つ具体的に記載された数値の%以下の範囲内であることを意味する。以下の例でも同様である。
CsFの含有量は、NMR法で測定した。
その他の成分の含有量はGC法で測定した。
4.27gのDMF(0.06mol)を反応器に加え-27℃に冷却した。前記反応器に12gの6フッ化プロピレンオキシド(0.07mol)を加え1時間撹拌した。撹拌後反応液を回収した。反応液をNMRで分析した。目的物の前駆体である4-フルオロ-5-オキソ-2,4-ビス(トリフルオロメチル)-1,3-ジオキソラン-2-カルボニルフルオリドが5%の収率で得られた。前駆体の収率が非常に低かったため第2工程を実施しなかった。
実施例1と同様にして得られた20gの下層液(13gの化合物1aを含む)、3.2gのCsF(21mmol)、7.1gのジグライム(53mmol)を反応器に加え120℃で12時間加熱し反応液を得た。反応液は上層液と下層液をGCで分析した。7.2gの化合物6aを純度74%で得た。
化合物6a:74GC%、ヘキサフルオロプロピレン:2.0GC%、化合物1a:1.1GC%、化合物14a:3.0GC%以下、化合物11a(H):0.1GC%、CsF:0.1%以下、化合物15a:0.1GC%、(CH3)2NCF2H:0.1GC%以下、ジグライム:15GC%以下
CsFの含有量は、NMR法で測定した。
その他の成分の含有量はGC法で測定した。
実施例2で得られた7.2gの化合物6aを含む下層液を、12.7gの炭酸カリウム(0.09mol)、28gのジメトキシエタン(0.3mol)に加え60℃で2時間撹拌し反応液を得た。反応液を濾過しろ液を取得し、ろ液を濃縮した。NMRで解析したところ7.0gの化合物8aを含む濃縮物を得た(収率44%)
化合物8a:80%、化合物14c:3.0%以下、化合物11a(H):0.1%、CsF:1.0%以下、KF:1.0%以下、化合物15c:0.1%、水:0.1%以下、ジグライム:10%以下
水の含有量はカールフィッシャー電量滴定法で測定した。
その他の成分の含有量はNMR法で測定した。
実施例3で得られた6.7gの化合物8aを反応器に加え、200℃で4時間、300℃で1時間加熱した。生成物を-78℃でトラップに回収しNMR、GCで解析したところ化合物5aを収率60%、純度95%で得た。
化合物5a:95GC%、ヘキサフルオロプロピレン:0.01GC%、化合物9a:1.0GC%以下、化合物11a(H):0.1GC%、化合物11b(Me):0.1GC%、化合物12a:0.1GC%、CsF:0.1%以下、KF:0.1%以下、化合物13a:0.1GC%、化合物10a:0.2GC%以下、ジグライム:4.0GC%以下、水:0.1%以下
CsF及びKFの含有量は、イオンクロマトグラフィー法で測定した。イオンクロマトグラフィー法では、前処理として、サンプルを同容量の超純水によって液液抽出して得られた液を測定に供した。
水の含有量はカールフィッシャー電量滴定法で測定した。
その他の成分の含有量はGC法で測定した。
実施例2と同様にして得られた83gの上層液、79gの下層液にメタノール32g(1mol)及び45gの水を加えて2時間撹拌した。生成液は2層に分離しており分液により下層液を回収して蒸留(150℃、5時間)することによって化合物7aを得た。収率は47%であった。
-77ppm (1F, CF2), -81ppm (3F, CFCF3), -82ppm (3F, CF3), -83ppm (1F, CF2), -124ppm(1F, CFCF3)
化合物7a:98GC%、化合物14b:0.1GC%以下、化合物11a(H):0.1GC%、化合物11b(Me):0.1GC%、化合物15b:0.1GC%、水:0.1%以下
水の含有量はカールフィッシャー電量滴定法で測定した。
その他の成分の含有量はGC法で測定した。
42gのメタノールに0.13molの水酸化カリウムを加えた。このメタノール液をガラスの反応器に加えた。このメタノール液に0.13molの化合物7aを徐々に加え20℃で1時間撹拌した。反応液から溶媒を濃縮器で留去し生成した固体を回収した。この個体を減圧乾燥して化合物8aを化学量論量で得た。
Claims (13)
- 式(1):
[式中、2つのR1は同一であり、フッ素原子又はフルオロアルキル基である。]
で表される化合物の製造方法であって、
式(2):
[式中、R1は前記と同意義である。]
で表される化合物と、
式(3-1):
[式中、
R31、R32、及びR33は、同一又は異なって、水素原子又はC1-10アルキル基であるか、或いは2つが互いに結合して、1個以上の置換基を有していてもよい環を形成していてもよい。]
で表される化合物
及び
式(3-2):
[式中、R34、R35、R36、及びR37は、同一又は異なって、水素原子又はC1-10アルキル基であるか、或いは2つが互いに結合して、1個以上の置換基を有していてもよい環を形成していてもよい。]
で表される化合物
からなる群から選択される少なくとも1種の化合物(3)とを、
式(4-1):
MHnFm (4-1)
[式中、Mは金属原子であり、nは0又は1であり、Mの原子価数とnの和はmである。]
で表される化合物、
式(4-2):
LR41 4F (4-2)
[式中、Lは窒素原子又はリン原子であり、R41は、同一又は異なって、C1-5アルキル基である。]
で表される化合物、及び
フッ酸又はその塩
からなる群から選択される少なくとも1種のフッ素化合物(4)
並びに
有機溶媒(当該有機溶媒からは、前記式(3-1)で表される化合物及び式(3-2)で表される化合物は除外される。)の存在下に反応させる工程A
を含む製造方法。 - 2つのR1は、同一に、C1-10フルオロアルキル基である、請求項1に記載の製造方法。
- 前記工程Aが上液層及び下液層が生成する工程であって、分液する工程Bをさらに含む、請求項1又は2に記載の製造方法。
- 式(5):
[式中、R1はフッ素原子又はフルオロアルキル基である。]
で表される化合物の製造方法であって、
前記工程A又はBで生成した式(1):
[式中、2つのR1は同一であり、フッ素原子又はフルオロアルキル基である。]
で表される化合物を、
式(4-1):
MHnFm (4-1)
[式中、Mは金属原子であり、nは0又は1であり、Mの原子価数とnの和はmである。]
で表される化合物、
式(4-2):
LR41 4F (4-2)
[式中、Lは窒素原子又はリン原子であり、R41は、同一又は異なって、C1-5アルキル基である。]
で表される化合物、及び
フッ酸又はその塩
からなる群から選択される少なくとも1種のフッ素化合物(4)
の存在下に加熱して
式(6):
[式中、R1は前記と同意義である。]
で表される化合物を生成させる工程C、
該式(6)で表される化合物を塩基と反応させて式(8):
[式中、R81は前記塩基に対応する基であり、R1は前記と同意義である。]
で表される化合物を生成させる工程D、及び
該式(8)で表される化合物を加熱して前記式(5)で表される化合物を生成させる工程E
を含む、方法。 - 前記工程D1において生成した液を精製して前記式(7)で表される化合物を得る工程D1aをさらに含む、請求項5に記載の製造方法。
- 前記工程D及び工程Eに代えて、
前記式(6)で表される化合物を塩基の存在下に加熱して前記式(5)で表される化合物を生成する工程F
を含む、請求項4に記載の方法。 - R72が直鎖又は分岐鎖状のC1-10アルキル基である請求項8に記載の化合物。
- R72がメチル、エチル、n-プロピル、イソプロピル、n-ブチル、sec-ブチル、又はtert-ブチルである請求項8に記載の化合物。
- 前記式(5)で表される化合物100質量部に対して、
前記式(9)で表される化合物の含有量が0.00001~0.5質量部であり、
前記式(10)で表される化合物の含有量が0.00001~0.5質量部である、
請求項12に記載の組成物。
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| CN114555576A (zh) * | 2019-10-04 | 2022-05-27 | 公益财团法人相模中央化学研究所 | 全氟(2,4-二甲基-2-氟甲酰基-1,3-二氧戊环)的制造方法 |
| JPWO2022244715A1 (ja) * | 2021-05-17 | 2022-11-24 | ||
| WO2023033073A1 (ja) * | 2021-09-02 | 2023-03-09 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| WO2024176981A1 (ja) * | 2023-02-22 | 2024-08-29 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
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| WO2020095915A1 (ja) * | 2018-11-06 | 2020-05-14 | 東ソ-株式会社 | パーフルオロ(2-メチレン-4-メチル-1,3-ジオキソラン)の製造方法 |
| CN113825747B (zh) * | 2019-05-13 | 2025-04-25 | 大金工业株式会社 | 氟代内酯及其制造方法 |
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| JPWO2022244715A1 (ja) * | 2021-05-17 | 2022-11-24 | ||
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| CN117355511A (zh) * | 2021-05-17 | 2024-01-05 | 东曹株式会社 | 1,4-二噁烷衍生物的制造方法、1,4-二噁烷衍生物及含有1,4-二噁烷衍生物的组合物、以及(1,3-二氧戊环)-2-羧酸衍生物的制造方法、(1,3-二氧戊环)-2-羧酸衍生物及含有(1,3-二氧戊环)-2-羧酸衍生物的组合物 |
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| JP2024046658A (ja) * | 2021-09-02 | 2024-04-03 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| JP2023036452A (ja) * | 2021-09-02 | 2023-03-14 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| JP7839417B2 (ja) | 2021-09-02 | 2026-04-02 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| WO2023033073A1 (ja) * | 2021-09-02 | 2023-03-09 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| WO2024176981A1 (ja) * | 2023-02-22 | 2024-08-29 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| JP2024119764A (ja) * | 2023-02-22 | 2024-09-03 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| JP7633575B2 (ja) | 2023-02-22 | 2025-02-20 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| JP2025029027A (ja) * | 2023-02-22 | 2025-03-05 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
| JP7824545B2 (ja) | 2023-02-22 | 2026-03-05 | ダイキン工業株式会社 | 含フッ素ジオキソランの製造方法及びその製造に有用な組成物 |
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| Publication number | Publication date |
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| JP2020132524A (ja) | 2020-08-31 |
| US12410150B2 (en) | 2025-09-09 |
| EP4406946A2 (en) | 2024-07-31 |
| JP6766907B2 (ja) | 2020-10-14 |
| KR20210127723A (ko) | 2021-10-22 |
| CN113423699A (zh) | 2021-09-21 |
| EP3925954A1 (en) | 2021-12-22 |
| EP3925954B1 (en) | 2025-12-17 |
| KR102676515B1 (ko) | 2024-06-20 |
| EP4406946A3 (en) | 2024-12-25 |
| EP4592282A3 (en) | 2025-10-08 |
| EP4592282A2 (en) | 2025-07-30 |
| EP3925954A4 (en) | 2022-12-14 |
| US20210371392A1 (en) | 2021-12-02 |
| CN119390676A (zh) | 2025-02-07 |
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