Chin. J. Org. Chem. ›› 2019, Vol. 39 ›› Issue (6): 1802-1807.DOI: 10.6023/cjoc201812033 Previous Articles     Next Articles

Notes

茂钛全氟丁基磺酸盐/锌粉体系高效催化不对称单硒醚合成

王灵晓a, 李宁波a, 王浩江a, 刘文a, 刁海鹏a, 许新华b   

  1. a 山西医科大学基础医学院 太原 030001;
    b 湖南大学化学化工学院 长沙 410082
  • 收稿日期:2018-12-19 修回日期:2019-02-03 出版日期:2019-06-25 发布日期:2019-02-22
  • 通讯作者: 李宁波, 刁海鹏 E-mail:ningboli@sxmu.edu.cn;diaohp@sxmu.edu.cn
  • 基金资助:

    国家自然科学基金(No.21802093)、山西省青年科学基金(No.201701D221035)、山西医科大学博士启动基金(No.03201501)资助项目.

Efficient Synthesis of Unsymmetrical Selenides Promoted by Titanocene Perfluorobutanesulfonate/Zinc Catalytic System

Wang Lingxiaoa, Li Ningboa, Wang Haojianga, Liu Wena, Diao Haipenga, Xu Xinhuab   

  1. a Basic Medical College, Shanxi Medical University, Taiyuan 030001;
    b College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082
  • Received:2018-12-19 Revised:2019-02-03 Online:2019-06-25 Published:2019-02-22
  • Contact: 10.6023/cjoc201812033 E-mail:ningboli@sxmu.edu.cn;diaohp@sxmu.edu.cn
  • Supported by:

    Project supported by the the National Natural Science Foundation of China (No. 21802093), the Shanxi Province Science Foundation for Youths (No. 201701D221035), and the PhD Start-up Foundation of Shanxi Medical University (No. 03201501).

In the presence of 10 mol% titanocene perfluorobutanesulfonate (1·H2O·THF), reductive cleavage Se-Se bond by zinc dust (1.2 equiv.) at room temperature led to nucleophilic selenium anion species, which reacted with bromoalkanes to afford unsymmetrical selenides in good to excellent yield using commercial tetrahydrofuran (THF) as solvent under N2 atmosphere. The possible reaction mechanism is that zinc dust reduces Cp2TiIV(OPf)2 (Pf=SO2C4F9) to produce Cp2TiOPf, which reacts with diaryl diselenides to form the intermediate Cp2TiIVSeAr(OPf). Then it further reacts with bromoalkanes to produce unsymmetrical selenides. In this paper, the synthesis of asymmetrical selenides catalyzed by 1·H2O·THF/Zn system is first reported. This method has the advantages of mild reaction conditions, simple operation and high yield.

Key words: titanocene perfluorobutanesulfonate, zinc dust, diaryl diselenides, bromoalkanes, unsymmetrical selenides