Reactions of α,β-Unsaturated Thiones with Diphenylcyclopropenone and Diphenylcyclopropenethione

Article abstract of DOI:10.1246/bcsj.59.3279

2-(Arylmethylene)tetralin-1-thione and 1-aryl-3-phenyl-2-propene-1-thione (thiochalcone) reacted with diphenylcyclopropenone across the =C-CO bond giving a thiophene derivative and a polysubstituted phenol with the arylketene/sulfur elimination, whereas the reaction with diphenylcyclopropenethhione took place as the C=S bond affording a spiro compound.