Stereoselective Preparation of Ceramide and Its Skeleton Backbone Modified Analogues via Cyclic Thionocarbonate Intermediates Derived by Catalytic Asymmetric Dihydroxylation of α,β-Unsaturated Ester Precursors
作者:Linli He、Hoe-Sup Byun、Robert Bittman
DOI:10.1021/jo001226n
日期:2000.11.1
yields. Furthermore, propargylic alpha-azido-beta-hydroxyester 10a is converted to D-erythro-sphingosine 2a via simultaneous reduction of the triple bond, azido, and ester functional groups with LiAlH(4), providing a highly concise and practical four-step synthesis of this key naturallyoccurring sphingolipid. The L-erythro stereoisomers are also available in high enantiomeric purity by the method described