有机化学    

研究论文

铜催化砜基诱导的区域选择性C(sp3)-H键杂芳基化反应

刘慧英+, 吴中天+, 李昊天, 吴新鑫*   

  1. 苏州大学材料与化学化工学部 江苏省有机合成重点实验室 江苏苏州 215123
  • 收稿日期:2024-06-22 修回日期:2024-07-09
  • 基金资助:
    国家自然科学基金(No. 22001185)资助项目和江苏省高等学校基础科学(自然科学)研究重大项目(23KJA150007).

Cu-catalyzed Regioselective Heteroarylation of C(sp³)-H Bond Induce by Sulfonyl Group

Huiying Liu+, Zhongtian Wu+, Haotian Li, Xinxin Wu*   

  1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123
  • Received:2024-06-22 Revised:2024-07-09
  • Contact: *E-mail: xxwu99@suda.edu.cn
  • About author:+These authors contributed equally to this work.
  • Supported by:
    National Natural Science Foundation of China (No. 22001185) and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (23KJA150007).

区域选择性碳氢键官能化反应具有良好的原子经济性和步骤经济性,在复杂分子和天然产物后期修饰中具有很大的应用潜力. 自由基参与的氢原子转移策略由于其高化学选择性和区域选择性近年来备受化学家们的关注. 由于C(sp³)-H键之间的BDE差异相对较小,烷基自由基参与的氢原子转移反应研究较少. 本文报道一种铜催化砜基诱导的区域选择性C(sp3)-H键杂芳基化反应. 该策略利用砜基α位烷基自由基作为分子内攫氢试剂,在铜催化的条件下实现区域选择性碳氮键的构建.

关键词: 自由基反应, 氢原子转移, 碳氢键官能化, 杂芳基化

The regioselective carbon-hydrogen bond functionalization reaction in atom- and step-economy holds significant potential for the late-stage elaboration of complex molecules and natural products. In recent years, the hydrogen atom transfer strategy involving radicals has garnered considerable attention from chemists due to its high chemoselectivity and regioselectivity. However, owing to the marginal differences in bond dissociation energies (BDEs) among C(sp³)-H bonds, hydrogen atom transfer reactions mediated by alkyl radicals remain less-developed. We report a copper-catalyzed sulfone-induced regioselective C(sp3)-H bond heteroarylation reaction. This strategy utilizes the α-alkyl radical of sulfone as an intramolecular hydrogen abstraction reagent, enabling the regioselective formation of carbon-nitrogen bonds under copper catalysis.

Key words: radical reaction, hydrogen atom transfer, C-H bond functionalization, heteroarylation