Abstract
A facile and expedient one-pot sequential five-component synthesis of highly substituted trispiro-pyrrolidine heterocycles is described. The key step involves [3 + 2]-cycloaddition of azomethine ylide. This multicomponent reaction (MCR) strategy provides a mild reaction condition, high yield of the products, high regioselectivity, and operational simplicity to assemble complex structural entity in a single operation. The structure of product was confirmed by IR, 1H-NMR, 13C-NMR, and high-resolution mass spectroscopic analysis. A theoretical insight is provided through MM2 calculation for the formation of the observed products.
Graphical Abstract
Acknowledgments
Funding University Grants Commission (UGC) (No F.4-5/2018 (FRP-Start-up-Grant) (Cycle IV) (BSR) dated June 2019. Author ARS thanks University Grants Commission (UGC) for the start-up grant under UGC-Faculty Recharge Programme and DG thanks Vels University for the support and encouragement..