Reaction of N,N '-disubstituted hydrazinecarbothioamides with 2-bromo-2-substituted acetophenones

Reaction of hydrazinecarbothioamides with 2-bromoacetophenones furnished the formation of thiazole-, bis-thiazole-, pyrazole- and 1,3,4-thiadiazole- derivatives in good yields. The mechanism was discussed. The structures of products were proved by MS, IR, NMR, elemental analyses and X-ray structure analyses. [GRAPHICS] .Peer reviewe