有机化学 ›› 2025, Vol. 45 ›› Issue (4): 1047-1096.DOI: 10.6023/cjoc202408019 上一篇    下一篇

综述与进展

N-邻位C(sp3)—H键官能团化合成含氮杂环化合物研究进展

范玉兰, 邹小颖, 朱小青, 郑绿茵*(), 郭维*()   

  1. 赣南师范大学化学化工学院 合成药物化学江西重点实验室 江西赣州 341000
  • 收稿日期:2024-08-15 修回日期:2024-09-20 发布日期:2024-11-08
  • 基金资助:
    国家自然科学基金(22167002); 国家自然科学基金(22467001)

Progress in N-α-C(sp3)—H Bond Functionalization for the Synthesis of N-Heterocycles

Yulan Fan, Xiaoying Zou, Xiaoqing Zhu, Lüyin Zheng(), Wei Guo()   

  1. Jiangxi Provincial Key Laboratory of Synthetic Pharmaceutical Chemistry, College of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, Jiangxi 341000
  • Received:2024-08-15 Revised:2024-09-20 Published:2024-11-08
  • Contact: * E-mail: zhenglvyin@126.com; guoweigw@126.com
  • Supported by:
    National Natural Science Foundation of China(22167002); National Natural Science Foundation of China(22467001)

C(sp3)—H键官能团化是当前有机合成领域的研究热点. N-邻位C(sp3)—H键中的氮原子上孤对电子与邻位碳自由基的单占分子轨道(SOMO)中的电子发生离域后, 降低了C(sp3)—H键的解离能, 有利于引入各种亲核试剂或亲偶极试剂, 通过分子间或分子内亲核环化或偶极环化反应得到结构多样的含氮杂环化合物. 按照N-邻位C(sp3)—H键在不同条件下形成亚胺离子、α-氨基烷基自由基和甲亚胺叶立德等三种中间体进行分类, 综述了近年来N-邻位C(sp3)—H键官能团化合成含氮杂环化合物的研究进展, 阐述了可能经历的化学反应历程, 对其应用前景进行了展望.

关键词: N-邻位C(sp3)—H键, 亚胺离子, α-氨基烷基自由基, 甲亚胺叶立德, 含氮杂环化合物

C(sp3)—H bond functionalization is currently a research hotspot in the field of organic synthesis. The delocalization effect between lone-pair electrons on the nitrogen atom in the N-α-C(sp3)—H bond with the electrons in single occupied molecular orbital (SOMO) of the neighboring carbon radical can reduce the dissociation energy of the C(sp3)—H bond, which facilitates the introduction of various nucleophilic or dipolar reagents into N-α-C(sp3) to provide a variety of nitrogen-contain- ing heterocyclic compounds with diverse structures through intermolecular or intramolecular nucleophilic annulation or dipole cyclization reactions. The research progress in N-α-C(sp3)—H bond functionalization for the synthesis of nitrogen-containing heterocyclic compounds under different conditions through the formation of iminium ions, α-aminoalkyl radicals, and azomethimine ylide intermediates is summarized. The possible reaction processes and their potential applications are discussed.

Key words: N-α-C(sp3)—H bond, iminium ions, α-aminoalkyl radicals, azomethimine ylides, N-heterocycles