Abstract The heterogeneous solid acid catalysts Amberlyst-15 and silica-HClO4 displays efficient catalytic properties for the synthesis of 2, 3-dihydroquinazolin-4 (1H)-ones from anthranilamide and various aldehydes/ketones under mild reaction conditions and in good yields. These catalysts also showed good catalytic activity for condensation of anthranilamide with a cyclic enol ether 3, 4-dihydropyran and led to formation of new ...
