有机化学 ›› 2018, Vol. 38 ›› Issue (1): 237-245.DOI: 10.6023/cjoc201706027 上一篇    下一篇

所属专题: 碳氢活化合辑2018-2019

研究论文

双锌催化剂催化的吡咯与查尔酮类化合物的不对称傅-克烷基化反应

华远照, 韩兴旺, 黄利华, 王敏灿   

  1. 郑州大学化学与分子工程学院 郑州 450000
  • 收稿日期:2017-06-19 修回日期:2017-07-15 发布日期:2017-08-09
  • 通讯作者: 黄利华, 王敏灿 E-mail:huanglh2207@163.com;wangmincan@zzu.edu.cn
  • 基金资助:

    国家自然科学基金(No.21272216)及河南省教育厅(Nos.17B150014,18B150028)资助项目.

Asymmetric Friedel-Crafts Alkylation of Pyrrole with Chalcones Catalyzed by a Dinuclear Zinc Catalyst

Hua Yuanzhao, Han Xingwang, Huang Lihua, Wang Mincan   

  1. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450000
  • Received:2017-06-19 Revised:2017-07-15 Published:2017-08-09
  • Contact: 10.6023/cjoc201706027 E-mail:huanglh2207@163.com;wangmincan@zzu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 21272216) and the Education Department of Henan Province (Nos. 17B150014, 18B150028).

报道了分子内双锌催化剂催化的吡咯和查尔酮类化合物的不对称傅-克烷基化反应,分子内双锌催化剂由手性配体(SS)-1和2 equiv.的二乙基锌原位反应生成.温和条件下,在15 mol%的催化剂作用下,反应以优秀的产率(高达99%)和优秀的对映选择性(对映体过量值高达99%)生成一系列β-吡咯二氢查尔酮化合物.并提出了一个可能的反应机理来解释反应的手性诱导过程.

关键词: 对映选择性催化, 傅-克烷基化, 锌, 氮杂半冠醚配体

An intramolecular dinuclear zinc complex was used in asymmetric Friedel-Crafts alkylation of pyrrole with a wide range of chalcone derivatives. This dinuclear zinc complex was prepared in situ by reacting the chiral ligand (S,S)-1 with 2 equiv. of ZnEt2. A series of β-pyrrole-substituted dihydrochalcones were formed mostly in excellent yields (up to 99%) and excellent enantioselectivities (up to >99% ee) by using 15 mol% catalyst loading under mild conditions. A possible mechanism was proposed to explain the origin of the asymmetric induction.

Key words: enantioselective catalysis, Friedel-Crafts alkylation, zinc, semi-azacrown ether ligand