Chinese Journal of Organic Chemistry ›› 2020, Vol. 40 ›› Issue (7): 1955-1966.DOI: 10.6023/cjoc202003028 Previous Articles     Next Articles


柯翠连a, 徐伟平a, 刘达a, 刘艳a, Keiji Maruokaa,b   

  1. a 广东工业大学轻工化工学院 广州 510006;
    b Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto, 606-8501, Japan
  • 收稿日期:2020-03-11 修回日期:2020-04-28 发布日期:2020-05-11
  • 通讯作者: 刘艳, Keiji Maruoka;
  • 基金资助:

Chiral Resolution of Biphenol and Asymmetric Alkylation under Phase Transfer Catalysis

Ke Cuiliana, Xu Weipinga, Liu Daa, Liu Yana, Maruoka Keijia,b   

  1. a School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;
    b Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto, 606-8501, Japan
  • Received:2020-03-11 Revised:2020-04-28 Published:2020-05-11
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Nos. 21977019, 21502023), the Guangdong Provincial Key Research and Development Program (No. 2019B020201005), the Open Project of Guangdong Provincial Key Laboratory of New Drug Screening (No. GDKLNDS-2018OF004).

Chiral phase transfer catalysts play extrememly important role in the construction of natural products, the core structures of chiral drugs, and functional chiral chemicals, therefore have attracted more and more attention in recent years. In this paper, the chiral resolution of biphenyl skeletons was achieved by utilizing the readily available (R)-α-methoxy benzene acetic acid as resolution agent. A series of new biphenyl type of phase transfer catalysts were designed and synthesized based on the optically pure C2-symmetric chiral biphenyl framework. These catalysts are readily applicable to asymmetric alkylation of N-(diphenylmethylene)glycine tert-butyl ester with excellent enantioselectivity (up to 96%) and yield (up to 97%). The structure-activity relationship study on these catalysts showed that the methylation of hydroxyl group at C2 and C2' position is favorable for the selectivity, introduction of tert-butyl group at C3 and C3' position is unfavorable to both selectivity and reactivity. The catalysts bearing 3,4,5-trifluorophenyl group or 3,5-bis(trifluoromethyl)phenyl group at C5 and C5' position showed good reactivity and selectivity.

Key words: phase-transfer catalysis, biphenyl derivatives, chiral resolution, asymmetric alkylation