A Flexible Common Approach to α-Substituted Serines and Alanines: Diastereoconvergent Syntheses of Sphingofungins E and F
作者:Bing Wang、Guo-Qiang Lin
DOI:10.1002/ejoc.200900772
日期:2009.10
A flexiblecommonapproach for the asymmetric syntheses of sphingofunginsE and F is reported, with efficient use of both diastereomers of the Baylis–Hillman adduct in a stereoconvergent manner. Pronounced steric effects of the 2-substituents in diastereoselective dihydroxylations of (E)-2-hydroxymethyl-2,3-alkenoates were observed. This strategy also allowed full control over the absolute configurations