Aqueous process for the preparation of 5-methyl-n-(aryl)-...

Details Aqueous process for the preparation of 5-methyl-n-(aryl)-... Aqueous process for the preparation of 5-methyl-n-(aryl)-...

C - Chemistry, Metallurgy

07

D

C07D 487/04 (2006.01)

Patent

CA 2029314

5-Methyl-N-(aryl)-1,2,4-triazolo[1,5-a]- pyrimidine-2-sulfonamides are prepared by the cyclization of N-(3-(((aryl)amino)sulfonyl)-1H-1,2,4- -triazol-5-yl)amines with 4-methoxy-3-butene-2-one or its synthethic equivalents in the presence of an aqueous base. By controlling the pH of the condesation between 8.5 and 10.5, by-product formation can be substantially reduced.

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