有机化学    

研究论文

可见光诱导叔胺促进的烯烃酰基氟烷基化反应

曾添晴a, 倪宇阳a, 袁瑶a,*, 朱钢国a,b,*   

  1. a浙江师范大学 金华 321004;
    b金华职业技术大学 金华 321017
  • 收稿日期:2026-02-23 修回日期:2026-04-04
  • 基金资助:
    国家自然科学基金(No.22071218)资助项目.

Visible-Light-Driven Tertiary Amine-Promoted Acylfluoroalkylation of Alkenes

Tianqing Zenga, Yuyang Nia, Yao Yuana,*, Gangguo Zhua,b,*   

  1. aKey Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China;
    bPostal code College of Pharmacy, Jinhua University of Vocational Technology, 888 Haitang West Road, Jinhua, 321017, China
  • Received:2026-02-23 Revised:2026-04-04
  • Contact: *E-mail: gangguo@zjnu.cn; yuanyao1993@zjnu.edu.cn
  • Supported by:
    National Natural Science Foundation of China (No. 22071218).

本文报道了一种可见光驱动的胺阳离子自由基介导的氢原子转移策略,成功实现了烯基醛与溴代二氟乙酸酯的氟烷基化环化反应。该方法通过原位形成电子给体-受体(EDA)复合物,在温和条件下实现了醛到酮的直接转化,并构建了含氟取代的环状酮类化合物。反应具有优异的官能团兼容性、广泛的底物适用性以及良好的产率。机理研究表明,胺阳离子自由基能够快速攫取烷氧基自由基α碳上的氢原子,有效避免了竞争性的1,5-HAT副反应。

关键词: 胺阳离子自由基, 氢原子转移, 醛酮转化, 自由基反应

A visible-light-driven fluoroalkylative cyclization of alkenyl aldehydes is achieved via amine radical cation-mediated hydrogen atom transfer. The reaction proceeds through an in-situ-formed electron donor-acceptor (EDA) complex between DABCO and ethyl bromodifluoroacetate, which under 390 nm LED irradiation generates difluoroalkyl radicals and amine radical cations. The amine radical cation then effects a key HAT step, delivering fluorinated cyclic ketones while suppressing competitive 1,5-HAT pathways. This protocol operates under mild, metal-free, and photocatalyst-free conditions, exhibits broad functional group tolerance, and is compatible with diverse alkenyl aldehydes and fluoroalkyl precursors.

Key words: amine radical cations, HAT, aldehyde-to-ketone transformation, radical reaction