有机化学 ›› 2021, Vol. 41 ›› Issue (10): 4050-4058.DOI: 10.6023/cjoc202105044 上一篇    下一篇

所属专题: 南开大学化学学科创立100周年 热点论文虚拟合集

研究论文

铱催化异羟肟酸衍生物参与的分子间N—N键偶联反应合成酰肼

宋方方, 朱士阳, 王浩*(), 陈弓*()   

  1. 南开大学 元素有机化学国家重点实验室 天津 300071
  • 收稿日期:2021-05-25 修回日期:2021-06-22 发布日期:2021-07-05
  • 通讯作者: 王浩, 陈弓
  • 基金资助:
    国家自然科学基金(21725204); 国家自然科学基金(21901127); 中国博士后科学基金(2018M640225); 中国博士后科学基金(2019T120179)

Iridium-Catalyzed Intermolecular N—N Coupling for Hydrazide Synthesis Using N-Benzoyloxycarbamates as Acyl Nitrene Precursor

Fangfang Song, Shiyang Zhu, Hao Wang(), Gong Chen()   

  1. State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University, Tianjin 300071
  • Received:2021-05-25 Revised:2021-06-22 Published:2021-07-05
  • Contact: Hao Wang, Gong Chen
  • Supported by:
    National Natural Science Foundation of China(21725204); National Natural Science Foundation of China(21901127); China Postdoctoral Science Foundation(2018M640225); China Postdoctoral Science Foundation(2019T120179)

报道了一类铱催化下异羟肟酸衍生物作为酰基氮宾前体参与的分子间N—N偶联合成酰肼化合物的反应. 与之前报道的二噁唑酮参与的反应不同, 该类氮宾前体不仅可以合成N-酰基肼类化合物, 又可以用于N-氧酰基肼类化合物的合成. 计算化学研究说明分子内氢键辅助N—O键断裂脱酸形成金属酰基氮宾中间体可能是决速步, 随后芳胺在氢键辅助下亲核进攻金属酰基氮宾形成N—N键.

关键词: 铱催化, 氮宾, 氮氮偶联, 酰肼, N—H插入

An iridium-catalyzed intermolecular N—N coupling reaction using various N-benzoyloxyamides as acyl nitrene precursor for hydrazide synthesis has been developed. Unlike the carboxylic acid-derived dioxazolones used in previous report, this type of precursors allows the efficient synthesis of both acyl and oxycarbonyl substituted hydrazines from readily accessible precursors. Computational chemistry studies indicated that formation of the metal-acylnitrenoid intermediates via intramolecular hydrogen bond-assisted N—O cleavage may be the rate-determining step, and the subsequent nucleophilic attack of metal-acylnitrenoid by arylamines may be assisted by Cl…HN hydrogen bond to form the N—N bond.

Key words: iridium catalysis, nitrene, N—N coupling, hydrazide, N—H insertion