Synthesis of novel ethyl 1-aryl-3-methyl-8-oxo-1,8-dihydropyrano[2,3:4,5] pyrimido[6,1-b]quinazoline-2-carboxylate derivatives

In this paper, a new series of ethyl 1-aryl-3-methyl-8-oxo-1,8-dihydropyrano[2′,3′:4,5]pyrimido[6,1-b]quinazoline-2-carboxylate derivatives was synthesised by the cyclisation of methyl anthranilate...