ChemInform Abstract: Synthesis of Fused Thiopyranthione and Thiophene Derivatives from 4,5‐Dihydro‐3‐thiophene(and ‐3‐furan)‐carbonitriles Having an Active Methylene Group at C‐2 Position.

Abstract

The title carbonitriles (III) are readily converted into novel fused thiopyranthione (V) and thiophene derivatives (VI). The Gewald reaction of nitrile (IIIb) with sulfur fails. -(MARUOKA*, H.; OKABE, F.; YAMASAKI, K.; MASUMOTO, E.; FUJIOKA, T.; YAMAGATA, K.; Heterocycles 81 (2010) 3, 675-688,