Synthesis of Branched-Chain Oligosaccharides in Sarsasaponins by Dehydrative Glycosylation
                                
                                    
                                        作者:Shinkiti Koto、Naohiko Morishima、Masaharu Uchino、Misa Fukuda、Masayo Yamazaki、Shonosuke Zen                                    
                                    
                                        DOI:10.1246/bcsj.61.3943
                                    
                                    
                                        日期:1988.11
                                    
                                    The branched-chain oligosaccharides, 6-O-(β-d-glucopyranosyl)-4-O-(α-l-rhamnopyranosyl)-d-glucopyranose, and 2,6-di-O-β-d-glucopyranosyl)-4-O-(α-l-rhamnopyranosyl)-d-glucopyranose, which compose sarsasaponins, as well as the structurally related 2-O-(β-d-glucopyranosyl)-4-O-(α-l-rhamnopyranosyl)-d-glucopyranose were synthesized stepwise via dehydrative glycosylation by a ternary mixture of p-nitrobenzenesulfonyl chloride, silver triflate, and triethylamine.
                                    组成沙棘
皂苷的支链低聚糖、6-O-(β-d-
吡喃
葡萄糖基)-4-O-(α-l-
吡喃
鼠李糖基)-d-
吡喃
葡萄糖和2,6-二-O-β-d-
吡喃
葡萄糖基)-4-O-(α-l-
吡喃
鼠李糖基)-d-
吡喃
葡萄糖,以及结构相似的2-O-(β-d-
吡喃
葡萄糖基)-4-O-(α-l-
吡喃
鼠李糖基)-d-
吡喃
葡萄糖,是通过
对硝基苯磺酰氯、三
氟甲基磺酸银和
三乙胺的三元混合物进行脱
水糖基化逐步合成的。