[EN] OLIGOSACCHARIDE C-GLYCOSIDE DERIVATIVES<br/>[FR] DÉRIVÉS DE C-GLYCOSIDES OLIGOSACCHARIDIQUES
申请人:OKINAWA INST SCIENCE & TECH SCHOOL CORP
公开号:WO2019182087A1
公开(公告)日:2019-09-26
The present invention provides a novel process for preparing an oligosaccharide C-glycoside derivative of formula I, comprising reacting a compound of formula II with compound of formula III in the presence of at least one primary or secondary amine and at least one additive [in the formulae, the substituents are as defined herein], and novel oligosaccharide C-glycoside derivatives that can be prepared using the process.
Condensations of nonsymmetrical or symmetrical beta-diketones and unprotected sugars in aq NaHCO3 soln were explored. C-glucosyl and C-maltosyl derivatives bearing lipophilic residue of 8 or 11 carbon atoms were prepared efficiently using this one-step procedure. The amphiphilic properties of these compounds were demonstrated by measuring their CMC.
C-Glycosidation of Unprotected Di- and Trisaccharide Aldopyranoses with Ketones Using Pyrrolidine-Boric Acid Catalysis
作者:Sherida Johnson、Avik Kumar Bagdi、Fujie Tanaka
DOI:10.1021/acs.joc.8b00340
日期:2018.4.20
trisaccharide aldopyranoses with various ketones is reported. The reactions were performed using catalyst systems composed of pyrrolidine and boric acid undermildconditions. Carbohydrates used for the C-glycosidation included lactose, maltose, cellobiose, 3′-sialyllactose, 6′-sialyllactose, and maltotriose. Usingketones with functional groups, C-glycosides ketones bearing the functional groups were obtained