Regioselective removal of the anomeric O-benzyl from differentially protected carbohydrates
作者:Nigel Kevin Jalsa
DOI:10.1016/j.tetlet.2011.09.130
日期:2011.12
A mild, regioselective deprotection of the anomeric O-benzyl from multi-functionally protected carbohydrates via catalytic transfer hydrogenation is described. The protocol is tolerant of O-benzyl and O-benzylidene protections at non-anomeric positions, groups which are normally labile under typical hydrogenolysis conditions. (C) 2011 Elsevier Ltd. All rights reserved.
Synthese der T-antigenen trisaccharide O-β-d-galactopyranosyl-(1→3)-O-(2-acetamido-2-desoxy-α-d-galactopyranosyl)-(1→6)-d-galactopyranose und O-β-d-galactopyranosyl-(1→3)-O-(2-acetamido-2-desoxy-α-d-galactopyranosyl)-(1→6)-d-glucopyranose und deren anknüpfung an proteine
作者:Hans Paulsen、Michael Paal
DOI:10.1016/0008-6215(83)88236-6
日期:1983.3
The synthesis of the trisaccharides O-beta-D-galactopyranosyl-(1 to 3)-O-(2-acetamido-2-deoxy-alpha-D-galactopyranosyl)-(1 to 6)-D-galactopyranose (15) and O-beta-D-galactopyranosyl-(1 to 3)-O-(2-acetamido-2-deoxy-alpha-D-galactopyranosyl)-(1 to 6)-D-glucopyranose (27) is described and the synthesis of alpha-D-glycosides by reaction of 3,4,6-tri-O-acetyl-2-azido-2-deoxy-beta-D-galactopyranosyl chloride