Stereoselective Synthesis of the Glycosidase Inhibitor Australine through a One-Pot, Double-Cyclization Strategy
作者:Celia Ribes、Eva Falomir、Miguel Carda、J. Alberto Marco
DOI:10.1021/ol062570v
日期:2007.1.1
[reaction: see text] A stereocontrolled, convergentsynthesis of the alkaloid australine, a glycosidase inhibitor of the pyrrolizidine class, is described. The chiral starting materials were ketone 3, derived from L-erythrulose, and alpha-alkoxy aldehyde 4, prepared from L-malic acid. A key step of the synthesis was the highly stereoselective aldol reaction between 4 and a Z boron enolate derived from