JPS5579360A - Preparation of n-methyl j-acid - Google Patents

Preparation of n-methyl j-acid

Info

Publication number
JPS5579360A
JPS5579360A JP15175978A JP15175978A JPS5579360A JP S5579360 A JPS5579360 A JP S5579360A JP 15175978 A JP15175978 A JP 15175978A JP 15175978 A JP15175978 A JP 15175978A JP S5579360 A JPS5579360 A JP S5579360A
Authority
JP
Japan
Prior art keywords
acid
reaction
methyl
monomethylamine
nahso
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
JP15175978A
Other languages
Japanese (ja)
Other versions
JPS5748110B2 (en
Inventor
Yoshio Kimura
Haruo Katsumata
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.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei Corp
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 Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Priority to JP15175978A priority Critical patent/JPS5579360A/en
Publication of JPS5579360A publication Critical patent/JPS5579360A/en
Publication of JPS5748110B2 publication Critical patent/JPS5748110B2/ja
Granted legal-status Critical Current

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

Abstract

PURPOSE: To obtain the title compound useful as an intermediate for the synthesis of reactive dyes in high yield, by reacting J-acid with monomethylamine in an aqueous solvent in the presence of NaHSO3 under reflux, and by coagulating the reaction mixture with an acid at a high temperature.
CONSTITUTION: J-Acid of formula I is reacted with monomethylamine in an aqueous solvent in the presence of NaHSO3 under reflux at 90W110°C, preferably 95W 105°C. After the reaction, the mixture is coagulated with an acid at almost the same temperature, and the deposited N-methyl J-acid is filtered. According to the low-temperature coagulation in the conventional method, the equilibrium is shifted to decompose the objective acid. This method provides a high yield due to the termination of reaction and crystallization at a high production.
COPYRIGHT: (C)1980,JPO&Japio
JP15175978A 1978-12-08 1978-12-08 Preparation of n-methyl j-acid Granted JPS5579360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15175978A JPS5579360A (en) 1978-12-08 1978-12-08 Preparation of n-methyl j-acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15175978A JPS5579360A (en) 1978-12-08 1978-12-08 Preparation of n-methyl j-acid

Publications (2)

Publication Number Publication Date
JPS5579360A true JPS5579360A (en) 1980-06-14
JPS5748110B2 JPS5748110B2 (en) 1982-10-14

Family

ID=15525666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15175978A Granted JPS5579360A (en) 1978-12-08 1978-12-08 Preparation of n-methyl j-acid

Country Status (1)

Country Link
JP (1) JPS5579360A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104045584A (en) * 2014-06-13 2014-09-17 浙江亿得化工有限公司 Clean production process of 2-(N-substituted amino)-5-naphthol-7-sulfoacid
CN105017095A (en) * 2015-07-07 2015-11-04 叶光明 Method for preparing 2-amino-5-naphthol-7-sulfonic acid

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051112U (en) * 1983-09-16 1985-04-10 松下電器産業株式会社 Air blower for vehicle air conditioning equipment
JPS6382615U (en) * 1986-11-19 1988-05-31
CN105566171B (en) * 2016-02-29 2017-06-16 江苏吉华化工有限公司 A kind of device for preparing H acid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104045584A (en) * 2014-06-13 2014-09-17 浙江亿得化工有限公司 Clean production process of 2-(N-substituted amino)-5-naphthol-7-sulfoacid
CN105017095A (en) * 2015-07-07 2015-11-04 叶光明 Method for preparing 2-amino-5-naphthol-7-sulfonic acid

Also Published As

Publication number Publication date
JPS5748110B2 (en) 1982-10-14

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