The use of 2-O-acyl-1-O-sulfonyl-d-galactopyranose derivatives in β-d-galactopyranoside synthesis
作者:H. Fredrick Vernay、Eliezer S. Rachaman、Ronald Eby、Conrad Schuerch
DOI:10.1016/0008-6215(80)90007-5
日期:1980.1
Abstract Several 1-O-sulfonyl derivatives of d -galactopyranose having a participating benzoyl or p-methoxybenzoyl group at O-2 were synthesized from the corresponding d -galactopyranosyl chloride derivatives by use of silver p-toluenesulfonate or trifluoroethanesulfonate in acetonitrile. The reaction of the 1-O- sulfonyl- d -galactopyranose derivatives with several alcohols in various solvents at
Synthesis of Standardized Building Blocks as a β-D-Mannosyl Donors with a Temporary Protection to be 3,6-Di-<i>O</i>-glycosyl Acceptors, for Constructing the Inner Core of Glycoproteins and Artificial Antigens
作者:El Sayed H. El Ashry、Conrad Schuerch
DOI:10.1246/bcsj.59.1581
日期:1986.5
The synthesis was started by methyl 2,3-O-isopropylidene-α-D-mannopyranoside, which upon benzylation, deisopropylidenation, and selective acetolysis of the 6-O-benzyl group afforded the corresponding tetraacetate, which could be converted to 3,6-di-O-allyl-4-O-benzyl-1,2-O-(1-methoxyethylidene)-β-D-mannopyranose. The orthoester could be separated into the exo and endo isomers. Hydrolysis of the orthoester
The synthesis of α- and β-(1 → 2)- and -(1 → 3)-linked glucopyranose disaccharides and their protein conjugates
作者:Ronald Eby、Conrad Schuerch
DOI:10.1016/s0008-6215(00)88056-8
日期:1982.4
-toluenesulfonamido)phenyl]ethyl α- and β- d -glucopyranosides. Disaccharides having the structure α- d -Glc p -(1 → 2)-α- d -Glc p , α- d -Glc p -(1 → 3)-α- d -Glc p , β- d -Glc p -(1 → 2)-β- d -Glc p , and β- d -Glc p -(1 → 3)-α- d -Glc p were synthesized. The oligosaccharides were debenzylated with sodium in liquid ammonia to give disaccharides having a free primary aromatic amino group, which were converted