Abstract: | γ‐Chlorocarbanions of proper nucleophilicity, generated from 3‐chloropropyl pentachlorophenyl sulfone (=pentachloro(3‐chloropropyl)sulfonyl]benzene; 1 ; Ar=C6Cl5), add to electron‐deficient formal imines 3a – l to produce anionic adducts that enter intramolecular substitution leading to substituted pyrrolidines. This new and simple synthesis of pyrrolidines mimics a 1,3‐dipolar cycloaddition, although it proceeds in two distinct steps. |