Facile Preparation of 3,4-Di-O-acetyl-1,6-anhydro-2-azido-2-deoxy-β-D-glucopyranose and Some Derivatives Thereof: Useful Precursors for Oligosaccharide Synthesis
Double glycosylation of methyl 2,4-di-O-benzyl-beta-D-mannopyranoside with ethyl 2-O-benzoyl-3,4,6-tri-O-benzyl-1-thio-alpha-D-mannopyranoside using as promoter tris(4-bromophenyl)ammoniumyl hexachloroantimonate, a stable, commercial, and crystalline radical cation, afforded after debenzoylation methyl 2,4-di-O-benzyl-3,6-di-O-(3,4,6-tri-O-benzyl-alpha-D-mannopyranoside in excellent yield. Other mannosyl
Formation of the 1,2,6-orthoester of mannose and its utilization in the glycosylation reaction
作者:Sayoko Hiranuma、Osamu Kanie、Chi-Huey Wong
DOI:10.1016/s0040-4039(99)01193-4
日期:1999.8
The synthesis of mannose 1,2,6-orthoester and its utilization in the glycosylation reaction are described. (C) 1999 Elsevier Science Ltd. All rights reserved.