Conformationally restricted pyrrolidines by intramolecular [2+2] photocycloaddition reactions†
Abstract
Intramolecular [2+2] photocycloaddition reactions of diversely substituted N-Boc protected 4-(allylaminomethyl)-2(5H)-furanones resulted in rigid products (53–75%) with three spatially defined positions for further functionalisation.