在
10% palladium on active carbon 氢气 作用下,
以
乙酸乙酯 为溶剂,
反应 24.0h,
以100%的产率得到1,4-bis<3-O-(1,2:5,6-di-O-isopropylidene-α-D-glucofuranos-3-yl)>butane
参考文献:
名称:
PALLADIUM-CATALYZED SYNTHESIS OF BIS-GLYCOSIDES OF BUT-2-ENE-1,4-DIOL, BUTANE-1,4-DIOL AND 1,2-BIS(PROPENYL)BENZENE
摘要:
Palladium(O)-catalyzed reaction of various carbohydrates derived from glucofuranose, mannofuranose, ribofuranose, glucopyranose, and glucosamine, bearing a free hydroxyl group, with 1,4-bis-(methoxycarbonyloxy)but-2-ene afforded the corresponding bis-glycosides of butene-1,4-diol. Hydrogenation in the presence of palladium on charcoal of these unsaturated compounds led to the formation of the bis-glycosides of butane-1,4-diol. The condensation was successfully extended to the bis-carbonate of 1,2-bis[(1-hydroxy)propen-2-yl]benzene and derivatives of glucofuranose, ribofuranose and glucosamine.
Palladium(O)-catalyzed reaction of various carbohydrates derived from glucofuranose, mannofuranose, ribofuranose, glucopyranose, and glucosamine, bearing a free hydroxyl group, with 1,4-bis-(methoxycarbonyloxy)but-2-ene afforded the corresponding bis-glycosides of butene-1,4-diol. Hydrogenation in the presence of palladium on charcoal of these unsaturated compounds led to the formation of the bis-glycosides of butane-1,4-diol. The condensation was successfully extended to the bis-carbonate of 1,2-bis[(1-hydroxy)propen-2-yl]benzene and derivatives of glucofuranose, ribofuranose and glucosamine.
Synthesis of novel bis (glycosyl) ethers as bolaamphiphile surfactants
作者:Pierre Gouéth、Abdellatif Ramiz、Gino Ronco、Grahame Mackenzie、Pierre Villa
DOI:10.1016/0008-6215(94)00269-l
日期:1995.1
new bolaamphiphile carbohydratederivatives having general structures AO(CH 2 ) n OB or [AO(CH 2 ) n ] 2 C(OH)R. The hydrophilic heads A and B (identical or different) are d -glucose, d -galactose, xylitol, or their respective protected derivatives, and R is an alkyl chain. The carbohydrate units A and B are condensed in the first step as di- O -isopropylidene derivatives with either α,ω-dibromo-