有机化学 ›› 2026, Vol. 46 ›› Issue (4): 1722-1729.DOI: 10.6023/cjoc202512043 上一篇    下一篇

研究论文

光诱导噻吨酮催化三氟甲基自由基介导的C(sp3)—H键的烷基化

李东生, 郑淏文, 邓红平*()   

  1. 南京农业大学理学院 南京 210095
  • 收稿日期:2025-12-28 修回日期:2026-02-10 发布日期:2026-03-13
  • 通讯作者: 邓红平
  • 作者简介:

    共同第一作者.

  • 基金资助:
    国家自然科学基金(21901121)

Trifluoromethyl Radical-Mediated C(sp3)—H Alkylation Enabled by Photoinduced Thioxanthone Catalysis

Dongsheng Li, Haowen Zheng, Hongping Deng*()   

  1. College of Sciences, Nanjing Agricultural University, Nanjing 210095
  • Received:2025-12-28 Revised:2026-02-10 Published:2026-03-13
  • Contact: Hongping Deng
  • About author:

    These authors contributed equally to this work.

  • Supported by:
    National Natural Science Foundation of China(21901121)

三氟甲基自由基作为一类三氟甲基化反应的重要中间体广为人知. 此外, 其还可作为氢原子转移试剂使用, 但相关研究目前仍较为有限. 发展了一种诱导噻吨酮催化三氟甲基自由基介导的C(sp3)—H键烷基化的方法. 该方法步骤经济性高, 条件温和, 无需外加氧化剂, 以廉价易得含C(sp3)—H键的化合物为原料, 高效合成了一系列苯乙酮衍生物. 机理研究表明, 该反应经过能量转移过程进行, 且是一个链式自由基反应.

关键词: 三氟甲基自由基, 噻吨酮, C(sp3)—H键的烷基化, 芳基乙烯基三氟甲磺酸酯, 能量转移

The trifluoromethyl radical is a well-established intermediate in trifluoromethylation reactions. It can also, however, act as a hydrogen atom transfer (HAT) reagent, a property that remains limited studies. A photoinduced, thioxanthone-catalyzed method for the trifluoromethyl radical-mediated C(sp3)—H alkylation was developed. This protocol offers step economy, mild reaction conditions, and operates without stoichiometric external oxidants. Utilizing readily available C(sp3)—H feedstocks, a wide range of acetophenone derivatives were synthesized efficiently. Mechanistic investigations suggest that the reaction proceeds through an energy transfer pathway, sustaining a radical chain mechanism.

Key words: trifluoromethyl radical, thioxantone, C(sp3)—H alkylation, arylvinyl trifluoromethanesulfonate, energy transfer