Abstract

Abstract: Among the several heterocyclic compounds containing aza- and oxa-heterocycles are predominant due to their abundant biological importance. The nanoparticles have demonstrated excellent catalytic activity under optimum conditions with higher reusability or recyclability and higher yields of synthetic heterocyclic targets. Previously we reviewed the synthesis of aza- and oxa-heterocycles catalyzed by metal nanoparticles (MNPs) during 2009-2019 and published an update of such reports of 2020 on the same subject. With anticipations to the next, the present comprehensive work highlights the synthesis of aza- and oxa-heterocycles catalyzed by MNPs reported during the year 2021 to update the reader of the present work with the most recent trends in selection of MNPs in the synthesis of desired heterocyclic scaffolds.

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