A Modified Thermodynamically Controlled Deracemization of 2-Allylcyclohexanone and Its Application to Asymmetric Synthesis of (<i>R</i>)-(−)-Epilachnene
作者:Hiroto Kaku、Natsuko Okamoto、Aya Nakamaru、Tetsuto Tsunoda
DOI:10.1246/cl.2004.516
日期:2004.5
The efficiency of thermodynamically controlled deracemization was influenced considerably by the solvent used. Based on this finding, an improved method was developed, by which 2-allylcyclohexanone was converted to the R-isomer of 93% ee in 72% yield. As an application of the method, (R)-(-)-epilachnene, an antipode of the defensive droplets from the Mexican bean beetle, Epilachna varivestis, was synthesized
热力学控制的去外消旋的效率受所用溶剂的影响很大。基于这一发现,开发了一种改进的方法,通过该方法,2-烯丙基环己酮以 72% 的产率转化为 93% ee 的 R-异构体。作为该方法的应用,(R)-(-)-epilachnene 是墨西哥豆甲虫 Epilachna varivestis 防御性液滴的对映体,在短时间内合成。