Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (9): 2388-2394.DOI: 10.1016/S1872-2067(22)64140-8

• Communication • Previous Articles     Next Articles

Visible-light photoredox-catalyzed selective carboxylation of C(sp2)-F bonds in polyfluoroarenes with CO2

Zhi-Yu Bo, Si-Shun Yan, Tian-Yu Gao, Lei Song, Chuan-Kun Ran, Yi He, Wei Zhang*(), Guang-Mei Cao, Da-Gang Yu#()   

  1. Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
  • Received:2022-04-29 Accepted:2022-05-19 Online:2022-09-18 Published:2022-07-20
  • Contact: Wei Zhang, Da-Gang Yu
  • About author:First author contact:

    †Contributed equally to this work.

  • Supported by:
    National Natural Science Foundation of China(22101191);National Natural Science Foundation of China(21822108);China Postdoctoral Science Foundation(2021M692261);Central Government Funds of Guiding Local Scientific and Technological Development for Sichuan Province(2021ZYD0063);and the Fundamental Research Funds for the Central Universities

Abstract:

Visible light-driven carboxylation with CO2 have emerged as a sustainable and powerful way to transfer waste to treasure. However, it is still challenging for aryl fluorides due to the low reactivities of both C(sp2)-F bonds and CO2. Herein, we report the first photocatalytic carboxylation of aryl C-F bonds with CO2. The visible-light photoredox catalysis enables selective carboxylation of strong C(sp2)-F bonds in diverse polyfluoroarenes, such as penta-, tetra-, and tri-fluoroarenes under mild conditions, providing a facile access to a series of important polyfluoroaryl carboxylic acids with good yields. In contrast to previous reports of direct capture of polyfluoroaryl radicals, mechanistic studies suggest that the reduction of fleeting polyfluoroaryl radicals into polyfluoroaryl anions might be involved in this transformation, which may open a new avenue for photocatalytic functionalization of aryl C-F bonds.

Key words: Carbon dioxide, Visible-light photoredox catalysis, Carboxylation, C-F functionalization, Polyfluoroarenes