REACTIONS OF <i>N</i>-SULFONYL-1,2,3-THIADIAZOLE-4-CARBIMIDAMIDES WITH SULFONYL CHLORIDES: REGIOSPECIFIC SYNTHESIS AND STRUCTURE OF 2-SULFONYL-1,2,3-TRIAZOLES

Abstract

Sulfonylation of 1,2,3-thiadiazolecarboxylic acid amidines in the presence of a base was found to be accompanied by the Cornforth rearrangement of the 1,2,3-thiadiazole ring into 1,2,3-triazole leading to the formation of 2-substituted 1,2,3-triazoles in high yields.