Process for the preparation of 2-amino-6-nitrobenzothiazole

US4369324A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Walter Horstmann · Bensberg, DE
• Richard Sommer
• Hans-Hermann Trautwein · Esslingen am Neckar, DE
• Gerhard Wolfrum · Waldershof, DE

Key dates

• Filing date: Apr 23, 1981
• Grant date: Jan 18, 1983
• Expiry date: Apr 23, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D277/82
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2-Amino-6-nitrobenzothiazole is obtained with a high selectivity if, instead of unprotected 2-aminobenzothiazole, acylation products thereof are nitrated and the acyl groups are then split off. 2-Amino-6-nitrobenzothiazole is an important intermediate product for the preparation of valuable azo dyestuffs.