Synthesis of Glycosyl Phosphates from 1,2-Orthoesters and Application to in Situ Glycosylation Reactions
作者:Alessandra Ravidà、Xinyu Liu、Linda Kovacs、Peter H. Seeberger
DOI:10.1021/ol0603155
日期:2006.4.1
A series of glycosyl phosphates were prepared in high yield by treatment of the corresponding 1,2-orthoesters with dibutyl phosphate. Glycosyl phosphates are efficient glycosylating agents even when used in crude form or when generated in situ. The immunodominant epitope trirhamnoside of group B Streptococcus was prepared to demonstrate the synthetic utility of the method.
Oligosaccharides related to xyloglucan: synthesis and X-ray crystal structure of methyl α-l-fucopyranosyl-(1→2)-β-d-galactopyranosyl-(1→2)-α-d-xylopyranoside and the synthesis of methyl α-l-fucopyranosyl-(1→2)-β-d-galactopyranosyl-(1→2)-β-d-xylopyranoside
作者:Derek K. Watt、Donald J. Brasch、David S. Larsen、Laurence D. Melton、Jim Simpson
DOI:10.1016/s0008-6215(00)00017-3
日期:2000.5
corresponding anomer of methyl 3,4-tri-O-benzyl-D-xylopyranoside. The resulting disaccharides were deacetylated and fucosylated using assisted halide reactions with tri-O-benzyl-alpha-L-fucopyranosyl bromide. Hydrogenolytic debenzylation of the resulting protected trisaccharides gave the methyl glycosides of the fucose-containing xyloglucan side chain. The structure of methyl alpha-L-fucopyranosyl-