Manufacture of 3-amino-2,1-benzisothiazoles

Details Manufacture of 3-amino-2,1-benzisothiazoles Manufacture of 3-amino-2,1-benzisothiazoles

1975-03-06

1976-09-21

Rizzo, Nicholas S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260558S, C07D27760

Patent

active

039818837

ABSTRACT:
Process for the manufacture of 3-amino-2,1-benzisothiazoles by oxidative ring closure of o-aminothiobenzamides, comprising the improvement of conducting the reaction in about 85 to 110% sulfuric acid which serves as solvent and oxidizing agent. 3-Amino-2,1-benzisothiazoles are important diazo components for blue azo dyes.

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