JPS57206670A - Preparation of 2-((2,3-dihydro-2-oxo-5-benzoxazolyl) carbonyl)-benzoic acid alkali metal salt - Google Patents

Preparation of 2-((2,3-dihydro-2-oxo-5-benzoxazolyl) carbonyl)-benzoic acid alkali metal salt

Info

Publication number
JPS57206670A
JPS57206670A JP8993681A JP8993681A JPS57206670A JP S57206670 A JPS57206670 A JP S57206670A JP 8993681 A JP8993681 A JP 8993681A JP 8993681 A JP8993681 A JP 8993681A JP S57206670 A JPS57206670 A JP S57206670A
Authority
JP
Japan
Prior art keywords
metal salt
benzoic acid
alkali metal
benzoxazolyl
dihydro
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
Application number
JP8993681A
Other languages
Japanese (ja)
Other versions
JPS6159629B2 (en
Inventor
Arinobu Kataoka
Kazuhiko Hata
Yoshinori Kobayashi
Katsuhisa Masumoto
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo 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 Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to JP8993681A priority Critical patent/JPS57206670A/en
Publication of JPS57206670A publication Critical patent/JPS57206670A/en
Publication of JPS6159629B2 publication Critical patent/JPS6159629B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prepare the titled compound useful as an intermediate of indanthrene dye, etc., economically, by reacting 2-(3-amino-4-hydroxybenzoyl)benzoic acid dialkali metal salt with phosgene keeping the pH of the reaction system at a specific level.
CONSTITUTION: An alkali metal salt of 2-[(2,3-dihydro-2-oxo-5-benzoxazolyl) carbonyl]benzoic acid is prepared in high yield and purity, by reacting 2-(3- amino-4-hydroxybenzoyl)-benzoic acid dialkali metal salt with phosgene at 0W 70°C, preferably 10W50°C keeping the pH of the reaction system at about the neutralization point of the phenol group in the alkali metal salt, i.e. ≥9.5pH, preferably 10W14pH.
COPYRIGHT: (C)1982,JPO&Japio
JP8993681A 1981-06-10 1981-06-10 Preparation of 2-((2,3-dihydro-2-oxo-5-benzoxazolyl) carbonyl)-benzoic acid alkali metal salt Granted JPS57206670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8993681A JPS57206670A (en) 1981-06-10 1981-06-10 Preparation of 2-((2,3-dihydro-2-oxo-5-benzoxazolyl) carbonyl)-benzoic acid alkali metal salt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8993681A JPS57206670A (en) 1981-06-10 1981-06-10 Preparation of 2-((2,3-dihydro-2-oxo-5-benzoxazolyl) carbonyl)-benzoic acid alkali metal salt

Publications (2)

Publication Number Publication Date
JPS57206670A true JPS57206670A (en) 1982-12-18
JPS6159629B2 JPS6159629B2 (en) 1986-12-17

Family

ID=13984576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8993681A Granted JPS57206670A (en) 1981-06-10 1981-06-10 Preparation of 2-((2,3-dihydro-2-oxo-5-benzoxazolyl) carbonyl)-benzoic acid alkali metal salt

Country Status (1)

Country Link
JP (1) JPS57206670A (en)

Also Published As

Publication number Publication date
JPS6159629B2 (en) 1986-12-17

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