Synthese der pentasaccharid-kette des forssman-antigens
作者:Hans Paulsen、Almuth Bünsch
DOI:10.1016/s0008-6215(00)81032-0
日期:——
ranosyl)-(1 leads to 3)-O-(6-O-acetyl-4-O-bebenzyl-2-deoxy-2-phthalimido-beta-D-galactopyranosyl)-(1 leads to 3)-6-O-acetyl-2,4-di-O-benzyl-alpha-D-galactopyranosyl bromide (40) (this was obtained through acetolysis of O-(6-O-acetyl-2-azido-3,4-di-O-benzoyl-2-deoxy-alpha-D-galactopyranosyl)-(1 leads to 3)-O-(6-O-acetyl-4-O-benzyl-2-deoxy-2-phthalimido-beta-D-galactopyranosyl)-(1 leads to 3)-1,6-anhydro-2
Silver zeolite - effective catalyst for the regio-stereoselective formation of the Neu5Acα2→6 glycosyl linkage - synthesis of several sialosaccharides
作者:Rexford L. Thomas、Arun K. Sarkar、Katsunori Kohata、Saeed A. Abbas、Khushi L. Matta
DOI:10.1016/0040-4039(90)80158-i
日期:1990.1
Several sialosaccharides containing the Neu5Acα2→6 glycosyl linkage have been synthesized using Ag-zeolite as an effectivecatalyst for exclusive α-glycosylation.
The sialylation approach reported by A. Khorlin et. al 30 years ago has been modified into a highly practical procedure for stereoselective alpha2-6 sialylation of galactopyranose 4,6-diols. (C) 2002 Elsevier Science Ltd. All rights reserved.
Regioselective Synthesis of Novel Mono-Substituted D-lactose Fatty Acid Ester Derivatives
Three regioisomers of lactose fatty acid monoesters at positions 3', 6' and 3 and other relatedcompounds have been chemically synthesized. The 3'- and 6'-O-palmitoyl-D-lactose derivatives were prepared via the regioselectiveesterification at O-3' and O-6' of the dibutylstannylene derivatives obtained from benzyl 2,3,6-tri-O-benzyl-4-O-(2,6-di-Obenzyl-β-D-galactopyranosyl)-β-D-glucopyranoside (1)