Process for the production of 4,5-disubstituted thiazoles

Details Process for the production of 4,5-disubstituted thiazoles Process for the production of 4,5-disubstituted thiazoles

1978-02-24

1979-05-08

Rizzo, Nicholas S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260158, C07D41702

Patent

active

041536070

ABSTRACT:
4,5-Disubstituted thiazoles are manufactured by reacting 4-amino-5-cyano-thiazoles with hydrogen sulfide in the presence of basic compounds, followed by dehydrogenating cyclization. The new 3-amino-thiazolo-(4,5-c)-isothiazoles I, 4-amino-5-thiocarbamidothiazoles III and 4,5-disubstituted thiazoles IV obtainable by the process of the invention are valuable intermediates for the manufacture of azo dyes and of crop protection agents.

REFERENCES:
patent: 3726891 (1973-04-01), Pilgram et al.
patent: 3878222 (1975-04-01), Spicer et al.
patent: 4009164 (1977-02-01), Beard

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