Novel highly efficient
<i>absolute</i>
optical resolution method by serial combination of two asymmetric reactions from acetylene monomers having racemic substituents
作者:Yanan Tang、Lijia Liu、Junpei Suzuki、Masahiro Teraguchi、Takashi Kaneko、Toshiki Aoki
DOI:10.1002/chir.23404
日期:2022.3
For general optical resolution, an optical resolution agent is necessary, and the best agent should be selected for each racemic compound. In this study, we will report that a novel optical resolution method by circularly polarized light (CPL) without any optical resolution agents has been developed by serially connecting two enantioselective reactions. These reactions we developed are the enantiomer-selective
一般的光学拆分需要使用光学拆分剂,每种外消旋化合物都应选择最佳的拆分剂。在这项研究中,我们将报告通过串联两个对映选择性反应,开发了一种新的圆偏振光 (CPL) 光学拆分方法,无需任何光学拆分剂。我们开发的这些反应是对映异构体选择性螺旋选择性聚合 ( ES-HSSP ) 和螺旋选择性选择性光环芳构化 ( SCAT ) 通过 CPL ( HS-SCAT )。由于这种显着独特的EPHS方法(EPHS = ES-HSSP + HS-SCAT) 选择性分解反应( HS-SCAT )不需要任何光学拆分剂、助催化剂和溶剂,该过程非常简单方便。由于该过程不包括目标外消旋体本身的任何分解,因此可以获得两种对映异构体。通过EPHS方法对映体分离的分离化合物的光学产率非常高,例如,薄荷醇、苯乙醇和 2-丁醇分别为 78%ee、93%ee 和 85%ee。此外,它们的化学收率约为 85% 至 94%。因此