A series of 2,3,4-trisubstituted 3,4-dihydroquinazoline 3 was prepared by intramolecular aza-Wittig reaction of amide carbonyl groups with methyldiphenyl iminophosphorane, which was obtained from a Ugi 4CC/Staudinger sequence. Further intramolecular Heck reaction of 3d'-g' in the presence of catalytic amount of Pd(OAc)(2) gave 6,12-dihydroindolo[2,1-b]quinazolines 4a-d in good y...
