JPS5515403A - Preparation of 4-alkoxycarbonyl-3, 5-dimethylphthalic anhydride - Google Patents

Preparation of 4-alkoxycarbonyl-3, 5-dimethylphthalic anhydride

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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
Application number
JP8671778A
Other languages
Japanese (ja)
Inventor
Toshiyuki Aizawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Denko KK filed Critical Showa Denko KK
Priority to JP8671778A priority Critical patent/JPS5515403A/en
Publication of JPS5515403A publication Critical patent/JPS5515403A/en
Pending legal-status Critical Current

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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
JP8671778A 1978-07-18 1978-07-18 Preparation of 4-alkoxycarbonyl-3, 5-dimethylphthalic anhydride Pending JPS5515403A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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