WO2008092583A2 - Verfahren zum herstellen von dihaloacetessigsäurealkylestern - Google Patents
Verfahren zum herstellen von dihaloacetessigsäurealkylestern Download PDFInfo
- Publication number
- WO2008092583A2 WO2008092583A2 PCT/EP2008/000438 EP2008000438W WO2008092583A2 WO 2008092583 A2 WO2008092583 A2 WO 2008092583A2 EP 2008000438 W EP2008000438 W EP 2008000438W WO 2008092583 A2 WO2008092583 A2 WO 2008092583A2
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- WIPO (PCT)
- Prior art keywords
- ethyl
- fluorine
- alkyl radicals
- aryl
- radicals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/333—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
- C07C67/343—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
Definitions
- the invention relates to a process for the preparation of Dihaloacetessigklaklastern of formula (I) by reacting ⁇ , ⁇ -dihaloamines of the formula (III) with carboxylic acid esters of the formula (II) in the presence of bases.
- Difluoroacetacetic acid alkyl esters are important synthesis building blocks for the preparation of agroactive materials, in particular for the preparation of pyrazolylcarboxanilides.
- Tetrahedron 2001, 57, 2689-2700 discloses that 4,4-difluoroacetacetic acid ester can be obtained by reacting ethyl difluoroacetoacetate with ethyl acetate in the presence of sodium hydride (NaH). The yield of this reaction is very unsatisfactory at 25%.
- Tetrahedron 1996, 52, 1 19-130 describes that 4,4-difluoroacetacetic acid ester can be prepared by the reaction of ethyl difluoroacetate with ethyl bromoacetate in the presence of Zn.
- WO-A-2005/003077 teaches a three-step process for preparing difluoroacetoacetic acid alkyl esters starting from chlorodifluoroacetoacetic acid esters by reduction of the chlorine atom with trialkoxyphosphines (P (OAlk) 3 ), which is also referred to as Perkow reaction.
- P (OAlk) 3 trialkoxyphosphines
- WO-A-2006/005612 teaches a process for the preparation of 4,4-difluoro-3-oxo-butyric acid esters by reacting 2,2-difluoro-N, N-dialkyl-acetamide with acetic acid esters in the presence of bases.
- the route described contains a large number of reaction steps; on the other hand, the 2,2-difluoro-N, N-dialkyl-acetamide used is not commercially available and can only be obtained in low yields of about 70% by fluorination of 2,2- Dichloro-N, N-dialkyl-acetamide are obtained.
- X is fluorine, chlorine or CF 3 ,
- X ' is fluorine, chlorine or bromine
- R 1 is selected from H, Ci.
- R 3 is independently of R 1 selected from Qn-alkyl, C 5 .i 8 -aryl or C 7 .i 9 -arylalkyl radicals,
- R is selected from Ci.i 2 alkyl radicals, C 5 .ig-aryl or C 7 .i 9 arylalkyl radicals,
- R 5 is independently of R 4 selected from Ci. ⁇ -alkyl radicals, C 5 . ] 8 aryl or C 7- i 9 arylalkyl radicals,
- R 2 is selected from hydrogen, C 5 .i 8 aryl, chloro, bromo and fluoro.
- X is selected from fluorine, chlorine or CF 3 ;
- R 1 is selected from C) -4 alkyl radicals
- R 2 is independently of R 1 selected from C 1 -4 alkyl radicals
- R 3 is independently of R 1 selected from C 1-4 alkyl
- R 4 is selected from C
- R 5 independently of R 4 selected from C ⁇ alkyl radicals.
- X is selected from fluorine or chlorine
- R 1 is selected from hydrogen or fluorine
- R 2 is hydrogen;
- R 3 is selected from methyl or ethyl;
- R 4 is selected from methyl or ethyl
- R is selected from methyl or ethyl.
- halogens includes those elements selected from the group consisting of fluorine, chlorine, bromine and iodine, with fluorine, chlorine and bromine being preferred and fluorine and chlorine being particularly preferably used.
- Optionally substituted radicals may be monosubstituted or polysubstituted, with multiple substituents the substituents may be the same or different.
- alkyl radicals are, unless otherwise defined, linear, branched or cyclic hydrocarbon radicals which optionally have one, two or more single or double unsaturations or one, two or more heteroatoms which are selected from O, N, P and S may have.
- the alkyl radicals according to the invention may optionally be substituted by further groups selected from -X, -OR ', -SR', -NR ' 2 , -SiR' 3 , -COOR ', -CN and -CONR 2 ' Groups, wherein R 'may be hydrogen or a C M alkyl group.
- the definition Ci-d 2 -alkyl comprises the largest range defined herein for an alkyl radical.
- this definition includes, for example, the meanings methyl, ethyl, n-, iso-propyl, n-, iso-, sec- and t-butyl, n-pentyl, n-hexyl, 1,3-dimethylbutyl, 3,3- Dimethylbutyl, n-heptyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl.
- Aryl radicals in the context of the present invention are cyclic aromatic hydrocarbon radicals which may have one, two or more heteroatoms selected from O, N, P and S and optionally substituted by further groups may be selected from -X, -OR ', -SR', -NR ' 2 , -SiR' 3) -COOR ', -CN and -CONR 2 ' groups, wherein R 'is hydrogen or a can be.
- C 5 .i 8 -aryl comprises the largest range defined herein for an aryl radical having 5 to 18 skeletal carbon atoms. Specifically, this definition includes, for example, the meanings cyclopentenyl, phenyl, cycloheptatrienyl, cyclooctatetraenyl, naphthyl and anthracenyl.
- Arylalkyl radicals are in the context of the present invention, unless otherwise defined, cyclic aromatic hydrocarbon radicals, the one, two or more
- Heteroatoms which may be selected from O, N, P and S and which have at least one Ci.
- g-alkyl side chain which may optionally form with another side chain a four, five or six membered ring and may optionally be substituted by further groups selected from -X, -OR ', -SR', -NR ' 2 , -SiR' 3 , -COOR ', -CN and -CONR 2 ' groups, wherein R 'may be hydrogen or a C ⁇ alkyl group.
- C 7 .i 9 arylalkyl radical includes the largest range defined herein for an arylalkyl radical having a total of 7 to 19 carbon atoms in the backbone and side chain. Specifically, this definition includes, for example, the meanings tolyl, o-xylyl, w-xylyl, p-xylyl and ethylphenyl.
- the compounds according to the invention can be present as mixtures of various possible isomeric forms, in particular of stereoisomers, such as, for example, E and Z, threo and erythro, as well as optical isomers, but optionally also of tautomers. Both the E and the Z isomers, as well as the threo and erythro, and the optical isomers, any mixtures of these isomers, as well as the possible tautomeric forms claimed.
- stereoisomers such as, for example, E and Z, threo and erythro
- optical isomers but optionally also of tautomers.
- radicals R 2 and R 3 are independently selected from H, Ci- 1 2-alkyl, C 5 .is- aryl or C 7 .i 9 -Arylalkyl- radicals, preferably from C 2 . 8- alkyl radicals, particularly preferably from C 3-6 -alkyl radicals.
- carboxylic acid esters examples include methyl acetate, ethyl acetate, ethyl fluoroacetate, ethyl bromoacetate, ethyl propionate, ethyl phenylacetate, ethyl benzoate.
- acetic acid esters are preferred, with ethyl acetate being particularly preferred.
- ⁇ , ⁇ -dihaloamines used according to the present invention are compounds according to the general formula (III)
- R 4 is selected from C M2 alkyl, C 5 or C 7 I8 -AIyI- .i 9 arylalkyl radicals, preferably from C. 2 8- alkyl radicals, more preferably from Ca ⁇ alkyl radicals;
- R 5 is independently of R 4 selected from Q. ⁇ - alkyl, C5.
- X is CF 3, fluorine or chlorine, with fluorine being preferred and
- X is fluorine, chlorine or bromine, with fluorine being preferred.
- the compounds are according to Petrov et al. in Journal of Fluorine Chemistry 109 (2001) 25-31 and Dmowski et al. in Chemistry of Organic Fluorine Compounds II, A Critical Review, ACS, Washington DC (1995) 263 by reacting fluorinated / halogenated alkenes with secondary amines and are commercially available, for example, from DuPont.
- the ⁇ -haloamines preferably used according to the present invention are, for example, selected from the group consisting of 1, 1, 2,2-tetrafluoroethyl-N, N-dimethylamine, 1,1,2,2-tetrafluoroethyl-N, N-diethylamine, 1,1,2-trifluoro-2- (trifluoromethyl) ethyl-N, N-dimethylamine, 1, 1, 2-trifluoro-2- (trifluoromethyl) ethyl-N, N-diethylamine (Ishikawa reagent), 1, 1 , 2-trifluoro-2-chloro-ethyl-N, N-dimethylamine and 1,1,2-trifluoro-2-chloro-ethyl-N, N-diethylamine (Yarovenko's reagent), where 1, 1, 2.2 Tetrafluoroethyl-N, N-dimethylamine and 1, 1, 2,2-tetrafluoroethyl-
- chloramines or their salts (analogous to Vilsmeier complex) from, for example Difluoroessigkladimethylamid and z. B to produce oxalyl chloride, phosgene or POC13:
- reaction of the ⁇ , ⁇ -dihaloamines of the formula (III) with the carboxylic acid esters of the formula (II) is usually carried out in the presence of bases, by means of which a deprotonation of the carboxylic acid esters takes place in the ⁇ -position to the carbonyl group.
- alkali metal hydroxides such as lithium, sodium or potassium hydroxide
- alkali metal such as NaOMe, NaOEt, NaOt-Bu, KOt-Bu
- hydrides such as NaH, KH
- alkyllithium reagents such as n-BuLi or t-Buli, LiN (iPr) 2)
- Grignard reagents such as CH 3 MgCl; Called phosphazenes and 1,8-diazabicyclo [5.4.0] undecene (DBU).
- the reaction of the ⁇ , ⁇ -dihaloamines with the carboxylic acid esters is usually carried out at temperatures from -50 to 60 ° C., preferably from -20 to 40 ° C., more preferably from -10 to 30 ° C.
- the reaction may be carried out under reduced pressure, under normal or high pressure, preferably under atmospheric pressure.
- the reaction can be carried out in bulk or in a solvent.
- the reaction is carried out in a solvent.
- Suitable solvents are, for example, selected from the group consisting of aliphatic and aromatic hydrocarbons, e.g. n-hexane, benzene or toluene which may be substituted by fluorine and chlorine atoms, such as methylene chloride, dichloroethane, fluorobenzene, chlorobenzene or dichlorobenzene; Ethers, e.g.
- the reaction can be carried out in excess of carboxylic acid ester (for example in ethyl acetate).
- the base and the carboxylic ester are preferably used in equimolar amounts. Alternatively, the base can also be used in excess.
- the ratio of base: carboxylic acid ester according to the invention is between 1.5: 1 and 0.9: 1, preferably between 1.4: 1, more preferably between 1.3: 1 and 1.05: 1.
- the carboxylic acid ester is introduced in bulk or dissolved in a suitable solvent and admixed successively with the base and subsequently reacted with the ⁇ , ⁇ -dihaloamine.
- the reaction is carried out in anhydrous apparatus under an inert gas atmosphere.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/524,923 US8044231B2 (en) | 2007-02-02 | 2008-01-22 | Method for producing dihalo acetoacetic alkyl esters |
| EP08707171.8A EP2114855B1 (de) | 2007-02-02 | 2008-01-22 | Verfahren zum herstellen von dihaloacetessigsäurealkylestern |
| ES08707171.8T ES2597853T3 (es) | 2007-02-02 | 2008-01-22 | Procedimiento para la preparación de ésteres alquílicos de ácido dihaloacetoacético |
| CN200880003534.2A CN101595081B (zh) | 2007-02-02 | 2008-01-22 | 制备二卤代乙酰乙酸烷基酯的方法 |
| JP2009547573A JP5264780B2 (ja) | 2007-02-02 | 2008-01-22 | ジハロアセト酢酸アルキルエステルを調製する方法 |
| DK08707171.8T DK2114855T3 (en) | 2007-02-02 | 2008-01-22 | Method for producing dihaloaceteddikesyrealkylestere |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007005296.2 | 2007-02-02 | ||
| DE102007005296A DE102007005296A1 (de) | 2007-02-02 | 2007-02-02 | Verfahren zum Herstellen von Dihaloacetessigsäurealkylestern |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2008092583A2 true WO2008092583A2 (de) | 2008-08-07 |
| WO2008092583A3 WO2008092583A3 (de) | 2008-09-18 |
| WO2008092583A8 WO2008092583A8 (de) | 2009-12-03 |
Family
ID=39473357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/000438 Ceased WO2008092583A2 (de) | 2007-02-02 | 2008-01-22 | Verfahren zum herstellen von dihaloacetessigsäurealkylestern |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US8044231B2 (de) |
| EP (1) | EP2114855B1 (de) |
| JP (1) | JP5264780B2 (de) |
| CN (1) | CN101595081B (de) |
| DE (1) | DE102007005296A1 (de) |
| DK (1) | DK2114855T3 (de) |
| ES (1) | ES2597853T3 (de) |
| TW (1) | TWI409252B (de) |
| WO (1) | WO2008092583A2 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK2089351T3 (en) * | 2006-10-27 | 2017-04-24 | Bayer Ip Gmbh | STEREOSELECTIVE ONE-STEP FLUORATION PROCEDURE FOR PREPARING 2-FLUORPROPIONATE |
| WO2009021987A1 (en) | 2007-08-16 | 2009-02-19 | Solvay (Société Anonyme) | Process for the preparation of esters of 4-fluorosubstituted 3-oxo-alcanoic acids |
| EP2133341A1 (de) * | 2008-02-25 | 2009-12-16 | Bayer CropScience AG | Verfahren zur regioselektiven Synthese von 1-Alkyl-3-haloalkyl-pyrazol-4-carbonsäure-Derivaten |
| CN102206155A (zh) * | 2011-04-19 | 2011-10-05 | 巨化集团公司 | 一种4,4-二氟乙酰乙酸乙酯的合成方法 |
| CN118063317B (zh) * | 2024-04-17 | 2024-06-21 | 江西农业大学 | 一种4,4-二氟乙酰乙酸乙酯的制备方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5489624A (en) | 1992-12-01 | 1996-02-06 | Minnesota Mining And Manufacturing Company | Hydrophilic pressure sensitive adhesives |
| US5567856A (en) | 1995-05-30 | 1996-10-22 | Hoechst Celanese Corporation | Synthesis of and hydroformylation with fluoro-substituted bidentate phosphine ligands |
| DE10331496A1 (de) * | 2003-07-01 | 2005-01-27 | Bayer Cropscience Ag | Verfahren zum Herstellen von Difluoracetessigsäurealkylestern |
| EP1644314B1 (de) | 2003-07-01 | 2011-08-10 | Bayer Cropscience AG | Verfahren zum herstellen von difluoracetessigs urealkylestern |
| GB0415764D0 (en) | 2004-07-14 | 2004-08-18 | Syngenta Participations Ag | Chemical process |
-
2007
- 2007-02-02 DE DE102007005296A patent/DE102007005296A1/de not_active Withdrawn
-
2008
- 2008-01-22 JP JP2009547573A patent/JP5264780B2/ja not_active Expired - Fee Related
- 2008-01-22 US US12/524,923 patent/US8044231B2/en active Active
- 2008-01-22 EP EP08707171.8A patent/EP2114855B1/de active Active
- 2008-01-22 DK DK08707171.8T patent/DK2114855T3/en active
- 2008-01-22 CN CN200880003534.2A patent/CN101595081B/zh not_active Expired - Fee Related
- 2008-01-22 WO PCT/EP2008/000438 patent/WO2008092583A2/de not_active Ceased
- 2008-01-22 ES ES08707171.8T patent/ES2597853T3/es active Active
- 2008-02-01 TW TW097103839A patent/TWI409252B/zh not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| TW200846318A (en) | 2008-12-01 |
| EP2114855B1 (de) | 2016-07-27 |
| ES2597853T3 (es) | 2017-01-23 |
| CN101595081B (zh) | 2014-04-23 |
| WO2008092583A8 (de) | 2009-12-03 |
| JP5264780B2 (ja) | 2013-08-14 |
| JP2010517950A (ja) | 2010-05-27 |
| TWI409252B (zh) | 2013-09-21 |
| WO2008092583A3 (de) | 2008-09-18 |
| EP2114855A2 (de) | 2009-11-11 |
| DE102007005296A1 (de) | 2008-08-07 |
| CN101595081A (zh) | 2009-12-02 |
| DK2114855T3 (en) | 2016-11-07 |
| US8044231B2 (en) | 2011-10-25 |
| US20100121095A1 (en) | 2010-05-13 |
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