N,N,N’,N’-tetrabromobenzene-1,3-disulfonamide and poly(N,N’-dibromo-N-ethyl-benzene-1,3-disulfonamide) were used as efficient catalysts for one-pot synthesis of new quinazoline derivatives from various aldehydes, 2- amino-benzophenone, and ammonium acetate in good to excellent yields and new benzopyrano[2,3-d]pyrimidine derivatives from salicylic aldehydes, various cyclic amines, and malononitrile in good to high yields.
