α,β-Unsaturated Nitriles in Heterocyclic Synthesis. Novel Synthesis of Pyridines and Thieno[2,3-<i>b</i>]pyridine Derivatives

Abstract

Abstract Arylmethylenecyanothioacetamide reacts with ethyl acetoacetate and acetylacetone to give the corresponding 3-cyano-2(1H)-pyridinethione derivatives, which can be alkylated at sulfur atom and cyclized into the corresponding thieno[2,3-b]pyridine derivatives.