JPS5515437A - Preparation of purified mephenamic acid - Google Patents

Preparation of purified mephenamic acid

Info

Publication number
JPS5515437A
JPS5515437A JP8792978A JP8792978A JPS5515437A JP S5515437 A JPS5515437 A JP S5515437A JP 8792978 A JP8792978 A JP 8792978A JP 8792978 A JP8792978 A JP 8792978A JP S5515437 A JPS5515437 A JP S5515437A
Authority
JP
Japan
Prior art keywords
acid
mephenamic
xylidine
adsorbent
halobenzoic
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
JP8792978A
Other languages
Japanese (ja)
Inventor
Akihiro Kobayashi
Akitsugu Tashiro
Yoshio Yamazaki
Shiyun Fujiki
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.)
Showa Denko Materials Co Ltd
Original Assignee
Hitachi Chemical Co Ltd
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 Hitachi Chemical Co Ltd filed Critical Hitachi Chemical Co Ltd
Priority to JP8792978A priority Critical patent/JPS5515437A/en
Publication of JPS5515437A publication Critical patent/JPS5515437A/en
Pending legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To prepare the title compound useful as a non-narcotic analgesic, etc. by condensing an o-halobenzoic acid with 2,3-xylidine, dissolveing the resulting crude mephenamic acid in a specific hot organic solvent, and treating the solution with a specific adsorbent.
CONSTITUTION: o-Halobenzoic acid or its alkali metal salt is condensed with 2,3- xylidine, and the obtained crude mephenamic acid or roughly purified mephenamic acid is dissolved in an organic solvnet such as benzene, toluene, xylene, ethylbenzene, anisole, chlorobenzene, etc., by heating, and treated with an adsorbent such as Japanese acid clay, active earth, silica gel, synthetic silica alumina, solid phosphoric acid, etc. to remove the color components.
EFFECT: Shortened purification process, simplified operations, and reduced solvent consumption and waste water.
USE: Antiphlogistic agent.
COPYRIGHT: (C)1980,JPO&Japio
JP8792978A 1978-07-19 1978-07-19 Preparation of purified mephenamic acid Pending JPS5515437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8792978A JPS5515437A (en) 1978-07-19 1978-07-19 Preparation of purified mephenamic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8792978A JPS5515437A (en) 1978-07-19 1978-07-19 Preparation of purified mephenamic acid

Publications (1)

Publication Number Publication Date
JPS5515437A true JPS5515437A (en) 1980-02-02

Family

ID=13928597

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8792978A Pending JPS5515437A (en) 1978-07-19 1978-07-19 Preparation of purified mephenamic acid

Country Status (1)

Country Link
JP (1) JPS5515437A (en)

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