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Poly(4-vinylpyridinium)hydrogen sulfate catalyzed an efficient and eco-friendly protocol for the synthesis of 9-pyrazolyl substituted-1,8-acridinediones in aqueous medium

Ravibabu Velpula, Janardhan Banothu, Rajitha Bavantula


A series of 9-pyrazolyl substituted-1,8-acridinediones have been prepared in a one pot procedure starting from dimedone/1,3-cycloheanedione, 1,3-disubstituted-1H-pyrazole-4-carbaldehydes and ammonium acetate utilizing poly(4-vinylpyridinium)hydrogen sulfate as an efficient, eco-friendly and recyclable catalyst in aqueous medium. Analytically pure products were formed within 40-50 min in excellent yields.  


9-Pyrazolyl substituted-1,8-acridinediones, 1,3-Disubstituted-1H-pyrazole-4-carbaldehydes, Poly(4-vinylpyridinium)hydrogen sulfate, Aqueous medium

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