Enamines; Part. 48 1. 3,4-Dihydroquinazolines from enamines and s ,S-dimethyl-N-( N-arylbenzimidoyl) sulfimides

Article abstract of DOI:10.1016/S0040-4020(01)81526-X

Treatment of S,S-dimethyl-N-(N-arylbenzimidoyl)sulfimides with enamines derived from ketones gives 4,4-disubstituted-2-phenyl-3,4-dihydro quinazolines. The reaction involves an 1,3-diaza-1,3-diene intermediate which undergo electrocyclic ring closure to g