Scalable Synthesis of <scp>l</scp>-Iduronic Acid Derivatives via Stereocontrolled Cyanohydrin Reaction for Synthesis of Heparin-Related Disaccharides
作者:Steen Uldall Hansen、Marek Baráth、Bader A. B. Salameh、Robin G. Pritchard、William T. Stimpson、John M. Gardiner、Gordon C. Jayson
DOI:10.1021/ol901723m
日期:2009.10.15
l-Ido cyanohydrin 3 was prepared from diacetone-d-glucose in four steps and 76% overall yield and 90% de via cyanohydrinreaction of aldehyde 2. This process can be scaled to provide >1 mol of pure l-ido cyanohydrin 3. Cyanohydrin 3 was elaborated to 1,2-isopropylidine-protected l-ido nitrile (8), iduronic amide 9, and known carboxy ester 10. Coupling of 8 and 9 with glucosamine donors leads to new