Stereoselectivity of glycosylation with derivatives of 2-azido-2-deoxy-d-galactopyranose. The synthesis of a determinant oligosaccharide related to blood-group a (type 1)
作者:Nikolai V. Bovin、Sergei É. Zurabyan、Anatoly Ya. Khorlin
DOI:10.1016/0008-6215(83)88263-9
日期:1983.1
6-tri-O-benzyl-2-deoxy-β- d -galactopyranosyl chloride (9) was found to be the most efficient glycosylating agent for the synthesis of oligosaccharides containing 2-acetamido-2-deoxy-α- d -galactopyranose residues, and gave a tetrasaccharide, which is a determinant of the blood-group A (Type 1), i.e., O-α- l -fucopyranosyl-(1→2)-[O-2-acetamido-2-deoxy-α- d - galactopyranosyl-(1→3)]-O-β- d -galactopyr
摘要在各种条件下,研究了2-叠氮基-2-脱氧-d-吡喃半乳糖衍生物对模型醇(环己醇)的立体选择性糖基化作用。发现2-叠氮基-3,4,6-三-O-苄基-2-脱氧-β-d-吡喃半乳糖基氯(9)是用于合成含有2-acetamido-2-的寡糖的最有效的糖基化剂脱氧-α-d-吡喃半乳糖残基,得到四糖,它是A型血型(1型)的决定因素,即O-α-1-呋喃核糖基-(1→2)-[O-2-乙酰氨基-2-脱氧-α-d-吡喃半乳糖-(1→3)]-O-β-d-吡喃半乳糖-(1→3)-2-乙酰氨基-2-脱氧-d-葡萄糖及其三糖片段, O-2-乙酰氨基-2-脱氧-α-d-半乳糖吡喃糖基-(1→3)-O-β-d-吡喃半乳糖基-(1→3)-2-乙酰胺基-2-脱氧-d-葡萄糖。在这个综合过程中,