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

Abstract

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.