Stereoselective Synthesis of<i>N</i>-Glycosyl Amino Acids by Traceless Staudinger Ligation of Unprotected Glycosyl Azides
作者:Filippo Nisic、Manuel Andreini、Anna Bernardi
DOI:10.1002/ejoc.200900692
日期:2009.11
stereoconservative Staudingerligation of unprotectedα- and β-glycosyl azides with 2-(diphenylphosphanyl)-4-fluorophenyl esters to afford α- and β-N-glycosyl aminoacids is described. The ligation method works reliably well for unprotected β-azides of the gluco, galacto and fuco series. Lower yields (ca. 50 %) were obtained with a β-glucosyl-N-acetyl azide. The reaction of an α-glucosyl azide also led to