Stereocontrolled Conversion of 3,5-Dioxopyrrolizidine Into (Z)- and (E)- 5-Acetonylpyrrolizidin-3-ones

Abstract
Stereocontrolled synthesis of (Z)-5-acetonyl-pyrrolizidin-3-one (4) and (E)-isomer 5 from 3,5-dioxopyrrolizidine 1 is described.