Preparation of 5-acylamino-1,2,4-triazole-3--sulfonamides...

Details Preparation of 5-acylamino-1,2,4-triazole-3--sulfonamides... Preparation of 5-acylamino-1,2,4-triazole-3--sulfonamides...

C - Chemistry, Metallurgy

07

D

260/313.3, 260/2

C07D 249/14 (2006.01) C07D 401/12 (2006.01)

Patent

CA 2005887

ABSTRACT A process for preparing 5-acylamino-1,2,4- triazole-3-sulfonamides, which are useful intermediates for the preparation of 1,2,4-triazolo[1,5-a]pyrimidine-2- sulfonamide herbicides, from 5-amino-3-mercapto-1,2,4- triazole by sequential acylation to 5-acylamino-3- mercapto-1,2,4--triazoles, chlorination to 5-acylamino- 3-chlorosulfonyl-1,2,4-triazoles, and condensation with substituted anilines to 5-acylamino-1,2,4-triazole-3- -sulfonamides.alpha. is provided. Novel 5-acylamino-3- chlorosulfonyl-1,2,4--triazole compounds are key intermediates in the process.

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