Hydrochloric Acid → (E)-N-(2-Chloro-6-methylphenyl)-3-ethoxyacrylamide

Participants

Reaction Conditions

Reaction Steps

PCT Publication No. WO 2005/077945 provides a process for the preparation of 2-amino-N-(2-chloro-6-methylphenyl)-1,3-thiazole-5-carboxamide (Formula 1c) which involves adding 3-ethoxyacryloyl chloride to a cold stirring solution of 2-chloro-6-methylaniline and pyridine in tetrahydrofuran at a temperature of 0° C. to 5° C. The mixture thus obtained was then warmed, stirred for 2 hours at 20° C., and hydrochloric acid was added at 0° C. to 10° C. The mixture was diluted with water and the resulting solution was concentrated under vacuum to a thick slurry. The slurry was diluted with toluene and stirred for 15 minutes at 20° C. to 22° C. then for 1 hour at 0° C. to obtain (E)-N-(2-chloro-6-methylphenyl)-3-ethoxyacrylamide.

Provenance & Evidence