Reaction of enaminothiones with diphenylcyclopropenone. Synthesis of 4,5-dimethylenecyclopentenone derivatives
摘要:
Diphenylcyclopropenone (1) reacts with enaminothiones 2 to afford 4,5-dimethylenecyclopentenone derivatives 3. The results of AM1 calculations performed on both geometrically optimized 2a and the oxygen analog in the Z,s-cis-configuration favor a mechanism in which the sulfur atom of 2 acts as a nucleophile at the phenyl-C of 1.