HETEROCYCLIC SYNTHESIS VIA A TANDEM AZA-WITTIG REACTION/ HETEROCUMULENE-MEDIATED ANNULATION REACTION.NEW METHODOLOGY FOR THE PREPARATION OF QUINAZOLINE DERIVATIVES.

Article abstract of DOI:10.1016/S0040-4039(00)82131-0

The aza-Wittig reaction of iminophosphoranes derived from N-substituted o-azidobenzamides or 2-(o-azido)phenyl benzimidazole with isocyanates, carbon dioxide or carbon disulphide, lead to functionalized 4(3H)-quinazolinones and benzimidazo<1,2-c>quinazolines respectively.