Synthesis of Sulfur-Containing Analogues of ΑGalNAc (Tn-Antigen) and ΒGal1,3ΑGalNAc (T-Antigen)
作者:Irmgard Wenzl、Norbert Neuwirth、Alexander G. Hedenetz、Christian Fiedler、Hansjörg Streicher、Frank M. Unger、Walther Schmid
DOI:10.1007/s007060200026
日期:2002.4.1
stepwise fashion, using mesylate as the leaving group at C-6 and triflate as the leaving group at C-4 in the reducing carbohydrate moiety. The synthesis of the thioanhydro analogue was achieved by introducing a thiocyanate group at C-6 into the glucose moiety, followed by subsequent displacement of a mesylate group at C-4 under inversion of configuration utilizing sodium methoxide.
开发了一种制备T-和Tn-抗原的硫代类似物的方法。因此,从已知的N-乙酰氨基葡糖苷衍生物开始,可以通过四步反应序列访问Tn-抗原的表二硫类似物。从二糖衍生物开始合成相应的表二硫代类似物和T-抗原的硫代脱水衍生物。为了制备表二硫代类似物, 通过 在还原碳水化合物部分中,使用甲磺酸酯作为C-6处的离去基团,使用三氟甲磺酸酯作为C-4处的离去基团,以逐步方式形成硫氰酸盐。硫代脱水类似物的合成是通过将C-6处的硫氰酸酯基引入葡萄糖部分,随后在利用甲醇钠进行构型反转的条件下,将C-4处的甲磺酸酯基团置换而实现的。