Sulfonium Triflate Mediated Glycosidations of Aryl 2-Azido-2-deoxy-1-thio-<scp>D</scp>-mannosides
作者:Remy E. J. N. Litjens、Leendert J. van den Bos、Jeroen D. C. Codée、Richard J. B. H. N. van den Berg、Herman S. Overkleeft、Gijsbert A. van der Marel
DOI:10.1002/ejoc.200400784
日期:2005.3
(phenylsulfinyl)piperidine (BSP) 1b/ trifluoromethanesulfonicanhydride (Tf2O) and diphenylsulfoxide (DPS) 1c/Tf2O-mediated glycosidations of 2-azido-3-O-benzyl-4,6-O-benzylidene-2-deoxy-D-thiomannosides 2a/b is described. Application of the BSP/Tf2O activator led to productive condensations using p-methoxyphenyl 2-azido-3-O-benzyl-4,6-O-benzylidene-2-deoxy-D-thiomannoside (2b) as a donor, while the more powerful