JPS5651436A - Preparation of p-chlorocarbonylbenzoic acid methyl ester - Google Patents
Preparation of p-chlorocarbonylbenzoic acid methyl esterInfo
- Publication number
- JPS5651436A JPS5651436A JP12813179A JP12813179A JPS5651436A JP S5651436 A JPS5651436 A JP S5651436A JP 12813179 A JP12813179 A JP 12813179A JP 12813179 A JP12813179 A JP 12813179A JP S5651436 A JPS5651436 A JP S5651436A
- Authority
- JP
- Japan
- Prior art keywords
- terephthalate
- preparation
- methyl ester
- acid methyl
- dimethyl terephthalate
- 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.)
- Granted
Links
Abstract
PURPOSE: To prepare the titled compound useful as a raw material of pharmaceuticals, polymer modifiers, etc., by partially saponifying dimethyl terephthalate, and without converting to carboxylic acid, reacting with a chlorinating agent.
CONSTITUTION: A methanol solution of dimethyl terephthalate is added with a methanol solution containing 1.0W1.5mol, based on 1mol of dimethyl terephthalate, of potassium hydroxide, and made to react with heating. The formed potassium salt of monomethyl terephthalate crystal is filtered, and reacted with a chlorinating agent selected from thionyl chloride, phosphorus pentachloride, phosphorus trichloride, and phosphorus oxychloride, to obtain p-chlorocarbonylbenzoic acid methyl ester. The process for the preparation of monomethyl terephthalate by saponifying a monometal salt of monomethyl terephthalate followed by acid treatment, which is essential in the conventional procedure, can be eliminated by this process.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12813179A JPS5651436A (en) | 1979-10-04 | 1979-10-04 | Preparation of p-chlorocarbonylbenzoic acid methyl ester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12813179A JPS5651436A (en) | 1979-10-04 | 1979-10-04 | Preparation of p-chlorocarbonylbenzoic acid methyl ester |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5651436A true JPS5651436A (en) | 1981-05-09 |
JPS621382B2 JPS621382B2 (en) | 1987-01-13 |
Family
ID=14977157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12813179A Granted JPS5651436A (en) | 1979-10-04 | 1979-10-04 | Preparation of p-chlorocarbonylbenzoic acid methyl ester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5651436A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02160385A (en) * | 1988-12-13 | 1990-06-20 | Riyousei Denso Kk | Connector housing |
-
1979
- 1979-10-04 JP JP12813179A patent/JPS5651436A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS621382B2 (en) | 1987-01-13 |
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