Enantioselective Total Synthesis of (+)-Scyphostatin, a Potent and Specific Inhibitor of Neutral Sphingomyelinase
作者:Tadashi Katoh、Munenori Inoue、Wakako Yokota
DOI:10.1055/s-2007-965893
日期:2007.2
The total synthesis of (+)-scyphostatin, a specific and potent neutral sphingomyelinase inhibitor from a microorganism, was accomplished for the first time starting from D-arabinose and both enantiomers of methyl 3-hydroxy-2-methylpropionate. The method involves (a) stereoselective aldol coupling of a methyl 1,3-dioxolane-4-carboxylate with the Garner aldehyde to establish the asymmetric quaternary
(+)-scyphosstatin 是一种来自微生物的特异性和有效的中性鞘磷脂酶抑制剂,首次从 D-阿拉伯糖和 3-羟基-2-甲基丙酸甲酯的两种对映异构体开始完成全合成。该方法包括 (a) 1,3-二氧戊环-4-羧酸甲酯与 Garner 醛的立体选择性羟醛偶联,以在 C4 处建立不对称季碳中心,(b) 所得二烯的闭环复分解以构建环己烯环,(c) 乙烯基碘化物和烷基碘化物的 Negishi 偶联以形成必需的三取代的 E-烯烃,(d) 从环己烯链段和三取代的 E-烯烃脂肪酸链段形成酰胺,和 (e) 立体定向由两个链段形成的酰胺的甲磺酸酯形成环氧环。