Asymmetric Aziridination over Ylides: Highly Stereoselective Synthesis of Acetylenyl‐<i>N</i>‐sulfonylaziridines

Abstract

Phase-transfer conditions can be used to synthesize (−)- or (+)-cis-acetylenyl-N-sulfonylaziridines (for example 3) by the reaction of N-sulfonylimines(1) with chiral sulfonium propargylides (2) derived from D-(+)-camphor. High cis selectivity and yields as well as moderate to good ee values are characteristic for these aziridinations.