Resolution of an Iridoid Synthon, Gastrolactol, by Means of Dynamic Acetylation and Lipase-Catalyzed Alcoholysis
作者:Ellen M. Santangelo、Didier Rotticci、Ilme Liblikas、Torbjörn Norin、C. Rikard Unelius
DOI:10.1021/jo015592y
日期:2001.8.1
A short synthetic route to asymmetric iridoids was developed. The three key steps were an intramolecular [4 + 2] cycloaddition reaction of an enamine derivative of 8-oxocitral (2), a dynamic acetylation, and an enzymatic resolution of the gastrolactyl acetates 5a and 5b, iridoids with three stereocenters. Some regio- and stereoselective heterogeneous catalytic hydrogenations of double bonds in iridoid
开发了合成不对称虹彩的简短途径。这三个关键步骤是8-氧肟酸酯(2)的烯胺衍生物的分子内[4 + 2]环加成反应,动态乙酰化以及乙酸甘油酯乙酸酯5a和5b的酶解,具有三个立体中心的虹彩化合物。讨论了环烯基配体中双键的一些区域和立体选择性非均相催化加氢反应。