Abstract 3-Arylsulfonylaminopyrazole-4-carboxamides and-carboxylates were synthesized from 3-arylsulfonylamino-3-methylthiocyanoacrylate derivatives as potential herbicidal inhibitors of the enzyme acetohydroxyacetic acid synthase (AHAS). Some of these compounds were reacted further with acetylacetone, giving 3-arylsulfonylaminopyrazolo [1, 5-a] pyrimidine-3-carboxamides by a novel route. During the synthesis of the 3- ...
