高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (12): 2032.

• 研究快报 • 上一篇    下一篇

钯催化烯丙基取代反应中手性配体的“甲基效应”

李枝蓬1, 汤方毅1, 伍新燕1, 周其林1,2, 陈新滋3   

  1. 1. 华东理工大学精细化工研究所, 上海 200237;
    2. 南开大学元素有机化学研究所, 元素有机化学国家重点实验室, 天津 300071;
    3. 香港理工大学应用生物与化学工程系, 香港
  • 收稿日期:2001-04-29 出版日期:2001-12-24 发布日期:2001-12-24
  • 通讯作者: 周其林(1957年出生),男,博士,教授,博士生导师,主要从事有机合成研究.
  • 基金资助:

    国家重点基础研究发展规划项目基金(编号:G2000077506);国家自然科学基金(批准号:29972027);香港理工大学ASD基金资助

The "Methyl Effect" in The Enantioselective Allylic Substitution Using Palladium/Chiral Pyridinylmethyl-oxazolines

LI ZhiPeng1, TANG FangYi1, WU XinYan1, ZHOU QiLin1,2, Albert S. C. Chan3   

  1. 1. Instituteof Fine Chemicals, East China University of Scienceand Technology, Shanghai 200237, China;
    2. State Key Laboratoryand Institute of Elemento-Organic Chemistry, NankaiUniversity, Tianjin 300071, China;
    3. Department of Applied Biology & Chemical Technology, the Hong Kong Polytechnic University, Hong Kong, China
  • Received:2001-04-29 Online:2001-12-24 Published:2001-12-24

关键词: 不对称催化, 烯丙基取代, 手性吡啶唑啉配体

Abstract: In this paper, two types of chiral ligands 1 and 2 containing pyridinyl moiety and oxazolines bridged by a methylene group were investigated in the palladium catalyzed substitution of 1,3 diphenyl 2 propenyl acetate with dimethyl malonate. Ligands 2, which have two methyl groups at the bridged methylene, gave higher enantioselectivities than their unsubstituted analogues 1. This "methyl effect" increased while the substituent on the C4 in the oxazoline ring was changed from benzyl to tert butyl. Despite of that the "methyl effect" was found in the palladium catalyzed enantioselective allylic substitution, it was obviously significant for assisting rational design of chiral ligands and catalysts in other asymmetric reaction.

Key words: Asymmetric catalysis, Allylic substitution, Chiral pyridinyl oxazoline ligand

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