MnO2–MWCNT nanocomposites as efficient catalyst in the synthesis of Biginelli-type compounds under microwave radiation

A novel Biginelli-like cyclocondensation reaction is efficiently catalyzed by MnO2–CNT nanocomposites as a new catalyst under microwave irradiation and solvent-free conditions in excellent yields. The major advantages of the present method are high yields, short reaction times and solvent-free reaction conditions, reducing reaction steps and purification of products by non-chromatographic methods. The activity, recovery and reusability of the catalyst are found to be good.

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► The procedure is efficient, simple, solvent less and high yielding.
► Solvent-free conditions in conjunction with microwave heating are used in this context.
► The catalyst equivalent to 0.03 g was sufficient for the reaction to proceed.