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A novel protocol using ZrO 2 -pillared clay (Zr-PILC), prepared by us as a mild recyclable solid acid catalyst for multicomponent one-pot synthesis of dihydropyrimidinones under solvent free conditions both by thermal and microwave heating using the Bronsted and Lewis acidity (proposed mechanism) of Zr-PILC is reported. The efficacy of the procedure is exemplified by the synthesis of biologically...
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