An Efficient Synthesis of (R)-3-{(R)-3-[2-O-(α-L-Rhamnopyranosyl)- α-L-rhamnopyranosyl] oxydecanoyl}oxydecanoic Acid, a Rhamnolipid fromPseudomonas Aeruginosa
作者:Howard I. Duynstee、Michiel J. van Vliet、Gijsbert A. van der Marel、Jacques H. van Boom
N-iodosuccinimide/triflic acid mediated one-pot two-step glycosylation of ethyl 2,3,4-tri-O-benzyl-1-thio-α-L-rhamnopyranoside (8) with phenyl 3,4-O-(2,3-dimethoxybutane-2,3-diyl)-1-thio-α-L-rhamnopyranoside (10b) and phenacyl (R)-3-hydroxydecanoate (13) gave rhamnolipid 17. The latter was transformed in five steps into the title compound 2. Esterification of 2 with diazomethane resulted into the corresponding
Hydrophobically Assisted Switching Phase Synthesis: The Flexible Combination of Solid-Phase and Solution-Phase Reactions Employed for Oligosaccharide Preparation
作者:Jörg Bauer、Jörg Rademann
DOI:10.1021/ja051737x
日期:2005.5.25
solid-supported chemistry and those of solution-phase synthesis. Starting from the examination of adsorption and desorption properties of hydrophobic molecules to and from reversed-phase silica, we designed a dilipid as a quantitative and fully reversible HASP anchor, permitting final product release. The utility of this new tool in synthetic organic chemistry was demonstrated on oligosaccharide preparation. The