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.
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