Efficient Enantioselective Synthesis of Functionalized Tetrahydropyrans by Ru-Catalyzed Asymmetric Ring-Opening Metathesis/Cross-Metathesis (AROM/CM)
作者:Dennis G. Gillingham、Osamu Kataoka、Steven B. Garber、Amir H. Hoveyda
DOI:10.1021/ja0458672
日期:2004.10.1
efficient method for enantioselectivesynthesis of highly functionalized pyrans (up to 98% ee) through Ru-catalyzed asymmetricring-opening metathesis/cross-metathesis is described. Reactions are promoted by a recyclable chiral Ru-chloride or a new chiral Ru-iodide complex; the latter catalyst is less efficient but gives rise to significantly higher levels of enantioselectivity. Catalytic reactions can be