ZnCl2-Mediated Stereoselective Addition of Terminal Alkynes to d-(+)-Mannofuranosyl Nitrones
摘要:
An optimized process for the addition of terminal alkynes to chiral nitrones using ZnCl2 and NEt3 in toluene is reported. The new reaction protocol is facile to perform and cost-effective. The resulting optically active propargyl N-hydroxylamines are isolated in good to excellent yield and high diastereoselectivity.