CA1105039A - Procede d'obtention de diesters de pyrroles substitues - Google Patents
Procede d'obtention de diesters de pyrroles substituesInfo
- Publication number
- CA1105039A CA1105039A CA336,509A CA336509A CA1105039A CA 1105039 A CA1105039 A CA 1105039A CA 336509 A CA336509 A CA 336509A CA 1105039 A CA1105039 A CA 1105039A
- Authority
- CA
- Canada
- Prior art keywords
- diester
- reaction medium
- acetone dicarboxylate
- carbonyl compound
- amine
- 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.)
- Expired
Links
- -1 pyrrole diesters Chemical class 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 93
- KAESVJOAVNADME-UHFFFAOYSA-N 1H-pyrrole Natural products C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000012429 reaction media Substances 0.000 claims abstract description 58
- 150000001728 carbonyl compounds Chemical class 0.000 claims abstract description 47
- 150000001412 amines Chemical class 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- BULLHNJGPPOUOX-UHFFFAOYSA-N chloroacetone Chemical compound CC(=O)CCl BULLHNJGPPOUOX-UHFFFAOYSA-N 0.000 claims abstract description 27
- 150000003141 primary amines Chemical class 0.000 claims abstract description 27
- 239000006185 dispersion Substances 0.000 claims abstract description 25
- 239000000376 reactant Substances 0.000 claims description 51
- OXTNCQMOKLOUAM-UHFFFAOYSA-L 3-oxopentanedioate Chemical compound [O-]C(=O)CC(=O)CC([O-])=O OXTNCQMOKLOUAM-UHFFFAOYSA-L 0.000 claims description 36
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical group NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 claims description 34
- 125000004432 carbon atom Chemical group C* 0.000 claims description 30
- 239000003960 organic solvent Substances 0.000 claims description 29
- 125000000217 alkyl group Chemical group 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 19
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical group CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims description 18
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 15
- 239000010410 layer Substances 0.000 claims description 14
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 8
- 238000013019 agitation Methods 0.000 claims description 8
- 239000012044 organic layer Substances 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 6
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 150000003973 alkyl amines Chemical class 0.000 claims description 4
- 125000002877 alkyl aryl group Chemical group 0.000 claims description 4
- 125000002088 tosyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1C([H])([H])[H])S(*)(=O)=O 0.000 claims description 4
- 238000010745 pyrrole synthesis reaction Methods 0.000 claims 7
- 150000001338 aliphatic hydrocarbons Chemical group 0.000 claims 6
- VQFAIAKCILWQPZ-UHFFFAOYSA-N bromoacetone Chemical compound CC(=O)CBr VQFAIAKCILWQPZ-UHFFFAOYSA-N 0.000 claims 6
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims 3
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 239000012431 aqueous reaction media Substances 0.000 abstract description 2
- 239000012430 organic reaction media Substances 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 25
- 239000000047 product Substances 0.000 description 22
- 238000007363 ring formation reaction Methods 0.000 description 12
- 239000002904 solvent Substances 0.000 description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000543 intermediate Substances 0.000 description 7
- 239000011541 reaction mixture Substances 0.000 description 7
- 150000003233 pyrroles Chemical class 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- ZSANYRMTSBBUCA-UHFFFAOYSA-N diethyl 3-oxopentanedioate Chemical compound CCOC(=O)CC(=O)CC(=O)OCC ZSANYRMTSBBUCA-UHFFFAOYSA-N 0.000 description 5
- 150000002148 esters Chemical class 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 150000005690 diesters Chemical class 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 239000012074 organic phase Substances 0.000 description 4
- GSNKRSKIWFBWEG-UHFFFAOYSA-N 3-ethylpentan-2-one Chemical compound CCC(CC)C(C)=O GSNKRSKIWFBWEG-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- YWLMDVDPKZKLNL-UHFFFAOYSA-N ethyl 2-(2-ethoxy-2-oxoethyl)-1,4-dimethylpyrrole-3-carboxylate Chemical compound CCOC(=O)CC1=C(C(=O)OCC)C(C)=CN1C YWLMDVDPKZKLNL-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- PTTPXKJBFFKCEK-UHFFFAOYSA-N 2-Methyl-4-heptanone Chemical compound CC(C)CC(=O)CC(C)C PTTPXKJBFFKCEK-UHFFFAOYSA-N 0.000 description 2
- OXTNCQMOKLOUAM-UHFFFAOYSA-N 3-Oxoglutaric acid Chemical class OC(=O)CC(=O)CC(O)=O OXTNCQMOKLOUAM-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 241000283986 Lepus Species 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- KEQGZUUPPQEDPF-UHFFFAOYSA-N 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione Chemical compound CC1(C)N(Cl)C(=O)N(Cl)C1=O KEQGZUUPPQEDPF-UHFFFAOYSA-N 0.000 description 1
- JENANTGGBLOTIB-UHFFFAOYSA-N 1,5-diphenylpentan-3-one Chemical compound C=1C=CC=CC=1CCC(=O)CCC1=CC=CC=C1 JENANTGGBLOTIB-UHFFFAOYSA-N 0.000 description 1
- GVUHUYQEAGMUNJ-UHFFFAOYSA-N 2-(1h-pyrrol-2-yl)acetic acid Chemical class OC(=O)CC1=CC=CN1 GVUHUYQEAGMUNJ-UHFFFAOYSA-N 0.000 description 1
- KDSNLYIMUZNERS-UHFFFAOYSA-N 2-methylpropanamine Chemical compound CC(C)CN KDSNLYIMUZNERS-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N 3-methyl-2-pentanone Chemical compound CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- RXFAGYKLLRXFDX-UHFFFAOYSA-N 3-propylhexan-2-one Chemical compound CCCC(C(C)=O)CCC RXFAGYKLLRXFDX-UHFFFAOYSA-N 0.000 description 1
- YLJJHNOCQAERGL-UHFFFAOYSA-N 4-methyl-3-propan-2-ylpentan-2-one Chemical compound CC(C)C(C(C)C)C(C)=O YLJJHNOCQAERGL-UHFFFAOYSA-N 0.000 description 1
- QHWIAGPQYKXGQV-UHFFFAOYSA-N 5-methyl-3-(2-methylpropyl)hexan-2-one Chemical compound CC(C)CC(C(C)=O)CC(C)C QHWIAGPQYKXGQV-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- FHWSCAGLIOSKSN-UHFFFAOYSA-N [Na].[Na].N1C=CC=C1 Chemical compound [Na].[Na].N1C=CC=C1 FHWSCAGLIOSKSN-UHFFFAOYSA-N 0.000 description 1
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 1
- WDJHALXBUFZDSR-UHFFFAOYSA-N acetoacetic acid Chemical compound CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 229940121363 anti-inflammatory agent Drugs 0.000 description 1
- 239000002260 anti-inflammatory agent Substances 0.000 description 1
- 230000003110 anti-inflammatory effect Effects 0.000 description 1
- 239000012223 aqueous fraction Substances 0.000 description 1
- 238000010936 aqueous wash Methods 0.000 description 1
- 125000003435 aroyl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000011021 bench scale process Methods 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000007805 chemical reaction reactant Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- XTHPWXDJESJLNJ-UHFFFAOYSA-N chlorosulfonic acid Substances OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 229960004132 diethyl ether Drugs 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- DPBLXKKOBLCELK-UHFFFAOYSA-N pentan-1-amine Chemical compound CCCCCN DPBLXKKOBLCELK-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- ROFHAMRIGHQRAK-UHFFFAOYSA-N propan-2-yl 1,4-dimethyl-2-(2-oxo-2-propan-2-yloxyethyl)pyrrole-3-carboxylate Chemical compound C(=O)(OC(C)C)C1=C(N(C=C1C)C)CC(=O)OC(C)C ROFHAMRIGHQRAK-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/30—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
- C07D207/34—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyrrole Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Plural Heterocyclic Compounds (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US95268278A | 1978-10-19 | 1978-10-19 | |
| US95271178A | 1978-10-19 | 1978-10-19 | |
| US952,682 | 1978-10-19 | ||
| US952,711 | 1978-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1105039A true CA1105039A (fr) | 1981-07-14 |
Family
ID=27130329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA336,509A Expired CA1105039A (fr) | 1978-10-19 | 1979-09-27 | Procede d'obtention de diesters de pyrroles substitues |
Country Status (7)
| Country | Link |
|---|---|
| CA (1) | CA1105039A (fr) |
| DE (1) | DE2942140A1 (fr) |
| FI (1) | FI793221A7 (fr) |
| FR (1) | FR2439185A1 (fr) |
| GB (1) | GB2034304A (fr) |
| NL (1) | NL7907735A (fr) |
| SE (1) | SE7908596L (fr) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388468A (en) * | 1980-04-04 | 1983-06-14 | Ethyl Corporation | Process for producing substituted pyrroles |
| US4565879A (en) * | 1980-04-04 | 1986-01-21 | Ethyl Corporation | Process for producing substituted pyrroles |
| US4383117A (en) | 1981-11-02 | 1983-05-10 | Ethyl Corporation | Process for producing substituted pyrroles |
| US4455433A (en) * | 1981-11-02 | 1984-06-19 | Ethyl Corporation | Process for producing substituted pyrroles |
| IT1151731B (it) * | 1982-04-21 | 1986-12-24 | Montedison Spa | Processo per la preparazione dell'acido 3-carbossi-1,4-dimetilpirrol-2-acetico |
| US4937368A (en) * | 1987-01-14 | 1990-06-26 | Syntex (U.S.A.) Inc. | Process for preparing (+)-2,3-dihydro-1H-pyrrolo[1,2-A]pyrrole-1,7-dicarboxylates |
| US4835288A (en) * | 1987-01-14 | 1989-05-30 | Syntex Inc. | Process for preparing (+)-2,3-dihydro-1H-pyrrolo[1,2-a]pyrrole-1,7-dicarboxylates |
| US4874872A (en) * | 1987-01-14 | 1989-10-17 | Syntex (U.S.A.) Inc. | Process for preparing (+)-2,3-dihydro-1H-pyrrolo[1,2-A]pyrrole-1,7-dicarboxylates |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3752826A (en) * | 1970-01-26 | 1973-08-14 | Mcneilab Inc | Aroyl substituted pyrroles |
-
1979
- 1979-09-27 CA CA336,509A patent/CA1105039A/fr not_active Expired
- 1979-10-17 SE SE7908596A patent/SE7908596L/xx not_active Application Discontinuation
- 1979-10-17 FR FR7925757A patent/FR2439185A1/fr active Pending
- 1979-10-17 FI FI793221A patent/FI793221A7/fi not_active Application Discontinuation
- 1979-10-18 DE DE19792942140 patent/DE2942140A1/de not_active Withdrawn
- 1979-10-18 GB GB7936183A patent/GB2034304A/en not_active Withdrawn
- 1979-10-19 NL NL7907735A patent/NL7907735A/nl not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FI793221A7 (fi) | 1981-01-01 |
| DE2942140A1 (de) | 1980-04-30 |
| GB2034304A (en) | 1980-06-04 |
| FR2439185A1 (fr) | 1980-05-16 |
| NL7907735A (nl) | 1980-04-22 |
| SE7908596L (sv) | 1980-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH1192423A (ja) | トリフルオロ酢酸及びクロロジフルオロ酢酸のメチルエステル又はエチルエステルの製造方法 | |
| US2528267A (en) | Eobeet j | |
| JP3378745B2 (ja) | 4−アシルアミノ−2,2,6,6−テトラメチルピペリジンの製造方法 | |
| US4284797A (en) | Process for separating mixtures of 3- and 4-nitrophthalic acid | |
| GB2034304A (en) | Process for producing substituted pyrrole diesters | |
| JPH0359894B2 (fr) | ||
| EP1041080B1 (fr) | Procédé de fabrication de pentaacétyl-beta-D-glucopyranose | |
| US4237304A (en) | Oxazolinium salts and method of preparation | |
| US3833652A (en) | Preparation of tetrachloroterephthaloyl chloride from chlorination of terephthaloyl chloride or terephthalic acid in a solution of chlorosulfonic acid | |
| RU2149874C1 (ru) | Способ получения диметиламинборана | |
| JPH01110650A (ja) | 精製された2,6−ナフタレジカルボン酸ビス(2−ヒドロキシエチル)エステルの製造方法 | |
| US3996289A (en) | Process for the preparation of 2-nitrobenzaldehyde | |
| KR840000115B1 (ko) | 카바졸 유도체의 제조방법 | |
| US4816580A (en) | Improved method for preparing penicillanic acid derivatives | |
| JPH0142254B2 (fr) | ||
| SU1114336A3 (ru) | Способ получени сложных эфиров аповинкаминовой кислоты | |
| US4017501A (en) | Process for preparing pyridinium chloride salts of alkyl esters of 2-chloro-N-2-hydroxyethylacetamide | |
| US4324906A (en) | Citric acid esters and process for producing citric acid | |
| KR840000704B1 (ko) | 트리사이클아졸의 제조방법 | |
| JP2773627B2 (ja) | O,o´−ジアシル酒石酸無水物の製造法 | |
| JP2732926B2 (ja) | 3―n―シクロヘキシルアミノフェノールの単離法 | |
| JPS6115862A (ja) | スクシノコハク酸ジアルキルの製法 | |
| JPS5857335A (ja) | 2−(1−インダノイル)酢酸類の製造方法 | |
| JP3439797B2 (ja) | アミン誘導体の製造法 | |
| HU180743B (en) | Process for preparing triciolazole |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19980714 |