Abstract

The asymmetric 1,3-dipolar cyclo­addition of azomethine ylides to electron-deficient alkenes is a powerful and atom-economical method for preparing structurally and stereochemically rich pyrrolidines. Substituted pyrrolidines are prevalent in natural alkaloids, pharmaceuticals, organocatalysts, and biologically important molecules. The authors described that silver(I)/TF-BiphamPhos (1) served as an efficient catalyst for the highly endo-selective 1,3-dipolar cycloaddition of azomethine ylides and vinyl phenyl sulfone with high yield (up to 98%) and high enantioselectivity (up to 92% ee).

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