Process for preparing an azo compound from a 2-aminothiazole dia

Details Process for preparing an azo compound from a 2-aminothiazole dia Process for preparing an azo compound from a 2-aminothiazole dia

1975-07-08

1977-09-06

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260146R, 260146D, 260154, 260155, 260156, C09B 2936

Patent

active

040467520

ABSTRACT:
A process for the direct preparation of pure thiazolazo compounds had been found with the use of a 2-aminothiazole as diazo or azo component in a coupling process wherein the 2-aminothiazole used therein is subjected to the usual coupling reaction, if used as diazocomponent after diazotation, without intermediate isolation after its preparation in known manner. This process avoids the preparation of the 2-aminothiazoles as starting compounds in its solid form and the expensive purification of these instable compounds and yields now very pure azo products.

REFERENCES:
patent: 2864812 (1958-12-01), Bossard et al.
patent: 3770719 (1973-11-01), Fisher et al.
patent: 3816391 (1974-06-01), Coates et al.

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