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.
DEHYDRATIVE α-GLUCOSYLATION USING A MIXTURE OF<i>p</i>-NITROBENZENESULFONYL CHLORIDE, SILVER TRIFLUOROMETHANESULFONATE,<i>N</i>,<i>N</i>-DIMETHYLACETAMIDE, AND TRIETHYLAMINE
作者:Naohiko Morishima、Shinkiti Koto、Shonosuke Zen
DOI:10.1246/cl.1982.1039
日期:1982.7.5
synthesis of α-linked di- and trisaccharides is performed by the one-stage glucosylation using 2,3,4,6-tetra-O-benzyl-α-D-glucopyranose and a mixture of p-nitrobenzenesulfonyl chloride, silver trifluoromethanesulfonate, N,N-dimethylacetamide, and triethylamine in dichloromethane.