JPS56147749A - Preparation of succinosuccinic acid dialkyl ester - Google Patents
Preparation of succinosuccinic acid dialkyl esterInfo
- Publication number
- JPS56147749A JPS56147749A JP5035380A JP5035380A JPS56147749A JP S56147749 A JPS56147749 A JP S56147749A JP 5035380 A JP5035380 A JP 5035380A JP 5035380 A JP5035380 A JP 5035380A JP S56147749 A JPS56147749 A JP S56147749A
- Authority
- JP
- Japan
- Prior art keywords
- dialkyl ester
- acid dialkyl
- alkali metal
- metal alcoholate
- ester
- 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.)
- Pending
Links
Abstract
PURPOSE: To obtain the titled compound useful as a raw material for quinacridone pigment in high yield in high selectivity, by condensing a succinic acid dialkyl ester in a specific mixed solvent in the presence of an alkali metal alcoholate, followed by neutralization.
CONSTITUTION: A succinic acid dialkyl ester (e.g., dimethyl succinate, etc.) is condensed in a mixed solvent of an aromatic hydrocarbon (e.g., benzene, etc.) or aliphatic hydrocarbon (e.g., hexane, etc. ) and N-methyl-ε-caprolactam in the presence of an alkali metal alcoholate at 70W150°C. The reaction product is neutralized with an inorganic acid, e.g. sulfuric acid, etc., to give succinosuccinic acid dialkyl ester (cyclohexa-1,4-diene-2,5-diol-1,4-dicarboxylic acid dialkyl ester). The amount of the alkali metal alcoholate used is 0.8W2mol based on 1mol of the raw material ester.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5035380A JPS56147749A (en) | 1980-04-18 | 1980-04-18 | Preparation of succinosuccinic acid dialkyl ester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5035380A JPS56147749A (en) | 1980-04-18 | 1980-04-18 | Preparation of succinosuccinic acid dialkyl ester |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56147749A true JPS56147749A (en) | 1981-11-16 |
Family
ID=12856534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5035380A Pending JPS56147749A (en) | 1980-04-18 | 1980-04-18 | Preparation of succinosuccinic acid dialkyl ester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56147749A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5885843A (en) * | 1981-11-17 | 1983-05-23 | Mitsui Toatsu Chem Inc | Preparation of succinylsuccinic diester |
JPH0448369U (en) * | 1990-08-31 | 1992-04-24 | ||
JPH04129282U (en) * | 1991-02-06 | 1992-11-25 | シロキ工業株式会社 | door lock device |
WO1994010249A1 (en) * | 1992-11-04 | 1994-05-11 | Zeneca Limited | Pigment manufacturing process |
-
1980
- 1980-04-18 JP JP5035380A patent/JPS56147749A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5885843A (en) * | 1981-11-17 | 1983-05-23 | Mitsui Toatsu Chem Inc | Preparation of succinylsuccinic diester |
JPH0118064B2 (en) * | 1981-11-17 | 1989-04-03 | Mitsui Toatsu Chemicals | |
JPH0448369U (en) * | 1990-08-31 | 1992-04-24 | ||
JPH04129282U (en) * | 1991-02-06 | 1992-11-25 | シロキ工業株式会社 | door lock device |
WO1994010249A1 (en) * | 1992-11-04 | 1994-05-11 | Zeneca Limited | Pigment manufacturing process |
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