On the Synthesis of Some 2-Arylhydrazono-3-oxothieno[2,3-b]pyridines by Reaction of Nitrilimines with 2-Mercaptonicotinic Acid

Abstract

Nitrilimines prepared from N-arylhydrazono chlorides reacted with 2-mercaptonicotinic acid yielding the corresponding addition products, 2-[(2-oxo-1-arylhydrazonopropan-1-yl)mercapto] nicotinic acids, which were treated with 1,1′-carbonyldiimidazole in THF affording by cyclocondensation the corresponding hitherto unknown 2-arylhydrazono-3-oxothieno[2,3-b]pyridines.