Nouvelle voie d'accès aux 1,2-trans-2-amino-2-désoxyglycopyranosides par l'intermédiaire des phosphoramidates de 1,2-trans-2-désoxy-2-iodoglycopyranosyles
作者:Dominique Lafont、Gérard Descotes
DOI:10.1016/0008-6215(88)80154-x
日期:1988.4
present in the medium. Use of simple alcohols yielded alkyl glycosides having β- d - gluco , β- d - xylo , α- d - manno , and α- d - lyxo configurations, respectively, starting from α- d - manno , α- d - lyxo , β- d - gluco , and β- d - xylo phosphoramidates, with excellent yields. The same reaction with an alcohol derived from galactopyranose led to the expected disaccharide with a low yield.
摘要1,2-反式-2-脱氧-2-脱氧-2-碘基吡喃糖基氨基磷酸酯(由相应的糖类通过加入碘叠氮化物,然后与亚磷酸酯进行斯托丁格反应制得),通过在碱存在下用醇处理至相应的1在C-1和C-2处的构型反转后,, 2-反式-2-脱氧-2-磷酰胺基多聚核糖苷。反应通过氮丙啶中间体进行,该中间体被存在于介质中的醇打开。使用简单的醇可分别从α-d-甘露聚糖,α-d-lyxo,β-d-葡萄糖,β-d-木糖醇,α-d-甘露糖和α-d-lyxo构成烷基糖苷。 β-d-葡萄糖和β-d-木糖基氨基甲酸酯,具有优异的收率。与衍生自吡喃半乳糖的醇的相同反应导致低产率的预期二糖。