The use of N-alkoxycarbonyl derivatives of 2-amino-2-deoxy-d-glucose as donors in glycosylation reactions
作者:Paul Boullanger、Martine Jouineau、Boufelja Bouammali、Dominique Lafont、Gérard Descotes
DOI:10.1016/0008-6215(90)84077-8
日期:1990.7
6-tri-O-acetyl-2-alkoxycarbonylamino-2-deoxy-alpha-D-glucopyra nosyl bromides have been used as donors in glycosylation reactions with model alcohols. beta-Glycosides were obtained in good yields and with a high degree of 1,2-trans stereoselectivity. An oxazolidinone was formed as the main product from the reaction of some of the glucopyranosyl bromides with alcohols of low reactivity, but the formation
1,3,4,6-四-O-乙酰基-2-烷氧基羰基氨基-2-脱氧-β-D-glu复制糖和3,4,6-三-O-乙酰基-2-烷氧基羰基氨基-2-脱氧-α在与模型醇的糖基化反应中,已将-D-吡喃葡萄糖烷基溴用作供体。β-糖苷以高收率和高度的1,2-反式立体选择性获得。恶唑烷酮是一些吡喃葡萄糖基溴化物与低反应性醇反应形成的主要产物,但所有产物的形成都可以通过烷氧基羰基氨基的强烈参与来解释。