作者:Injae Song、Hyewon Lim、Simin Chun、Seok Beom Lee、Jungmoo Huh、Dong-Chan Oh、Suckchang Hong
DOI:10.1021/acs.jnatprod.1c00173
日期:2021.4.23
isolated in 1972, the synthesis of gaylussacin has never been reported. Herein, we report the first total synthesis of gaylussacin in six steps with an overall yield of 23.8%, as well as the synthesis of its derivatives. Structurally, gaylussacin contains a carboxylic acid and a glycoside along with a free phenol on the same benzene ring, making selective functionalization for the synthesis of 1 difficult
Gaylussacin ( 1 ) 是一种芪葡萄糖苷,已从Pentarhizidium orientale 中分离出来并用于韩国民间医学。尽管它于 1972 年首次被分离出来,但从未报道过gaylussacin 的合成。在此,我们报告了首次以 23.8% 的总产率为 23.8% 的六步全合成法以及其衍生物的合成。在结构上,盖鲁沙星在同一个苯环上含有羧酸和糖苷以及游离酚,这使得合成1 的选择性功能化变得困难。Heck 交叉偶联被用作引入二苯乙烯部分的关键步骤。糖基化后全局脱保护提供天然产物1。