JPS5515403A - Preparation of 4-alkoxycarbonyl-3, 5-dimethylphthalic anhydride - Google Patents
Preparation of 4-alkoxycarbonyl-3, 5-dimethylphthalic anhydrideInfo
- Publication number
- JPS5515403A JPS5515403A JP8671778A JP8671778A JPS5515403A JP S5515403 A JPS5515403 A JP S5515403A JP 8671778 A JP8671778 A JP 8671778A JP 8671778 A JP8671778 A JP 8671778A JP S5515403 A JPS5515403 A JP S5515403A
- Authority
- JP
- Japan
- Prior art keywords
- alkoxycarbonyl
- anhydride
- solvent
- give
- aliphatic
- 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
Landscapes
- Furan Compounds (AREA)
Abstract
PURPOSE: To obtain the title compound, an intermediate of antiarteriosclerotics and antithrombotics, from 4-alkoxycarbonyl-3, 5-dimethylphthalic acid, easily in an industrial scale, by heating above a specific temp. or by heating in a specific solvent.
CONSTITUTION: 4-Alkoxycarbonyl-3, 5-dimethylphthalic acid of the formula (R= lower alkyl) is heated to ≥120°C or in an organic solvent having a b.p.of≥70°C, e.g. aliphatic or alicyclic ketones, hydrocarbon halides, aromatic hydrocarbons, aliphatic ethers, and cyclic ethers, to remove the water produced and to give the corresponding anhydride. Dehydration proceeds, without any influence to 4-alkoxycarbonyl group, efficiently to give the anhydride. For example, methyl ethyl ketone, benzene etc. is used as the solvent.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8671778A JPS5515403A (en) | 1978-07-18 | 1978-07-18 | Preparation of 4-alkoxycarbonyl-3, 5-dimethylphthalic anhydride |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8671778A JPS5515403A (en) | 1978-07-18 | 1978-07-18 | Preparation of 4-alkoxycarbonyl-3, 5-dimethylphthalic anhydride |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5515403A true JPS5515403A (en) | 1980-02-02 |
Family
ID=13894634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8671778A Pending JPS5515403A (en) | 1978-07-18 | 1978-07-18 | Preparation of 4-alkoxycarbonyl-3, 5-dimethylphthalic anhydride |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5515403A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3261846A (en) * | 1961-06-30 | 1966-07-19 | Standard Oil Co | Recovery of trimellitic acid product |
JPS4914215A (en) * | 1972-05-24 | 1974-02-07 |
-
1978
- 1978-07-18 JP JP8671778A patent/JPS5515403A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3261846A (en) * | 1961-06-30 | 1966-07-19 | Standard Oil Co | Recovery of trimellitic acid product |
JPS4914215A (en) * | 1972-05-24 | 1974-02-07 |
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