An efficient multicomponent synthesis of tetrahydropyrans using novel recyclable nanocrystalline Y2(CO3)3 catalyst

Recoverable and recyclable heterogeneous Y2(CO3)3 nanoparticles efficiently catalysed the one-pot synthesis of tetrahydropyrans via multicomponent reaction of dimedone, aromatic aldehyde, and malanonitrile using methanol as a solvent. The desired products were obtained with 84–95% yields. The present approach offers several significants such as short reaction time, high yield, easy purification, minimum catalyst loading, and use as an alternative catalyst. Y2(CO3)3 and Zr(CO3)2 nanoparticles were prepared by hydrothermal method. The synthesized catalysts was characterized by various analytical investigative techniques like FTIR, XRD, SEM, EDAX, TEM with SAED, and BET surface area.