Catalyst-Free Intramolecular 1,3-Dipolar Cycloaddition of Ethyl (2-Formylphenyl) Vinylphosphonates: A Highly Stereoselective Access to Phosphadihydrocoumarin-Fused Pyrrolizidines/Pyrrolidines

Abstract

Pyrrolizidine and coumarins both have biological activities, and their molecular skeletons are commonly found in several biomolecules and drug molecules. We have developed a catalyst-free, intramolecular 1,3-dipolar cycloaddition to synthesize phosphadihydrocoumarin-fused pyrrolizidine/pyrrolidine scaffolds with high stereoselectivity.

Key words

catalyst-free - intramolecular - 1,3-dipolar cycloaddition - stereoselectivity - phosphadihydrocoumarin - pyrrolizidine - pyrrolidine

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