作者:Toshio Nishikawa、Yuya Koide、Shigeo Kajii、Kyoko Wada、Miyuki Ishikawa、Minoru Isobe
DOI:10.1039/b414905j
日期:——
The total synthesis of α-C-mannosyltryptophan (C-Man-Trp), a naturally occurring C-glycosylamino acid, was achieved from a commercially available α-methyl-D-mannoside in 10 steps including the following key steps: the C-glycosidation of a mannose derivative with a stannylacetylene, Castro indole synthesis, and Sc(ClO4)3-promoted coupling with L-serine-derived aziridine carboxylate. The glucose- and galactose-analogues of C-Man-Trp were also synthesized in a similar manner. Conformational analyses of the synthesized C-glycosyltryptophan and its synthetic intermediate are briefly discussed.
通过 10 个步骤(包括以下关键步骤:甘露糖衍生物与链烷乙炔的 C-糖苷化反应、卡斯特罗吲哚合成、Sc(ClO4)3 促进与 L-丝氨酸衍生的氮丙啶羧酸酯偶联)从市售的δ-甲基-D-甘露糖苷中完全合成了δ-C-甘露糖基色氨酸(C-Man-Trp),这是一种天然的 C-糖基氨基酸。C-Man-Trp 的葡萄糖和半乳糖类似物也是用类似方法合成的。本文简要讨论了合成的 C-糖基色氨酸及其合成中间体的构象分析。