Synthesis of novel 15-aryl-2,3,4,15-tetrahydrochromeno[2′,3′:4,5] pyrimido[6,1- b ]quinazoline-1,9-diones

A new series of 15-aryl-2,3,4,15-tetrahydrochromeno[2′,3′:4,5]pyrimido[6,1-b]quinazoline-1,9-diones was synthesised by the cyclisation of methyl anthranilate with ethyl N-(3-cyano-5-oxo-4-aryl-5,6,...