作者:Keisuke Fukaya、Yu Yamaguchi、Ami Watanabe、Hiroaki Yamamoto、Tomoya Sugai、Takeshi Sugai、Takaaki Sato、Noritaka Chida
DOI:10.1038/ja.2016.6
日期:2016.4
The practical synthesis of the C-ring precursor of paclitaxel starting from 3-methoxytoluene is described. Lipase-catalyzed kinetic resolution of a substituted cyclohexane-1,2-diol, derived from 3-methoxytoluene in three steps, successfully afforded a desired enantiomer with >99% ee, which was transformed to a cyclohexenone. 1,4-Addition of a vinyl metal species, followed by Mukaiyama aldol reaction
描述了从3-甲氧基甲苯开始的紫杉醇C环前体的实际合成。脂肪酶催化的3-步骤衍生自3-甲氧基甲苯的取代的环己烷-1,2-二醇的动力学拆分,成功获得了期望的对映体,其对映体> 99%,将其转化为环己烯酮。1,4-添加乙烯基金属物质,然后在路易斯酸存在下,穆凯山醛醇与福尔马林反应,在已知的紫杉醇C环前体中形成10 g的紫杉醇。