Synthesis of a tri- and a tetradeoxy analogue of methyl 3,6-di-O-α-d-mannopyranosyl-α-d-mannopyranoside for investigation of the binding site of various plant lectins
作者:Stefan Oscarson、Pär Svahnberg
DOI:10.1016/s0008-6215(98)00107-4
日期:1998.5
and 2,4,3′,4′-tetradeoxy analogues of the trimannoside part of the core structure of N-linked glycoproteins, methyl 3,6-di- O - α - d -mannopyranosyl- α - d -mannopyranoside, is described. A 2,4-dideoxy (16)-linked disaccharide was used as a common intermediate acceptor, which was coupled with a 3-deoxy and a 3,4-dideoxy benzochlorosugar donor, the latter prepared from methyl α - d -mannopyranoside in
摘要N-连接糖蛋白甲基3,6-di-O-α核心结构的三甘露糖苷部分的2,4,3'-三苯氧基和2,4,3',4'-四脱氧类似物的合成描述了-d-甘露吡喃糖基-α-d-甘露吡喃糖苷。2,4-二脱氧(16)-连接的二糖用作常见的中间受体,与3-脱氧和3,4-二脱氧苯并氯代糖供体偶联,后者由甲基α-d-甘露吡喃糖苷在五种条件下制得脚步。尽管对酸敏感的供体和受体,使用三氟甲磺酸银作为促进剂(分别为65%和51%)获得了三脱氧-和四脱氧三糖的可接受的糖基化产率。然后一步脱保护得到目标产物。