One-Step, Stereocontrolled Synthesis of Glycosyl 1-Phosphates, Uridine-5‘-diphosphogalactose, and Uridine-5‘-diphosphoglucose from Unprotected Glycosyl Donors
作者:Stephen Hanessian、Pu-Ping Lu、Hideki Ishida
DOI:10.1021/ja982783i
日期:1998.12.1
α-l-fucosyl 1-phosphate. An alternative method that relies on neighboring group participation allowed the preparation of a protected β-l-fucosyl 1-phosphate. Reaction of unprotected β-d-glucopyranosyloxy and β-d-galactopyranosyloxy MOP donors with uridine diphosphoric acid gave UDP-Glc and UDP-Gal with preponderance of the desired α-anomeric configuration.
2-(1,2-反式吡喃糖氧基)-3-甲氧基吡啶(MOP 糖苷)与磷酸反应生成相应的 1,2-cis-1-磷酸酯,收率高,立体选择性好。α-d-吡喃葡萄糖、α-d-吡喃半乳糖和2-叠氮基-2-脱氧-α-d-吡喃半乳糖的1-磷酸酯因此在不求助于保护基团的情况下制备。在 l-岩藻糖系列中,主要产品是 α-l-岩藻糖基 1-磷酸。一种依赖于相邻基团参与的替代方法允许制备受保护的 β-l-岩藻糖基 1-磷酸。未保护的 β-d-吡喃葡萄糖基氧基和 β-d-吡喃半乳糖氧基 MOP 供体与尿苷二磷酸的反应得到 UDP-Glc 和 UDP-Gal,其中主要是所需的 α-异头构型。