A novel and facile carbodiimide-mediated synthesis of 2,3-dihydro-6H-pyrimido[2,1-b]quinazolin-4(1H)-ones via a tandem intramolecular nucleophilic addition/intramolecular hetero conjugate addition annulation strategy

Article abstract of DOI:10.1016/S0040-4039(96)02131-4

A novel and efficient carbodiimide-mediated synthetic method for new 2,3-dihydro-6H-pyrimido[2,1-b]quinazolin-4(1H)-ones (4) is described which involves initial intramolecular addition of an amino-nucleophile to the carbodiimide-cumulenic system, followed by intramolecular hetero conjugate addition annulation. Copyright (C) 1996 Elsevier Science Ltd.