广东工业大学陈迁团队近日研究了CO₂可见光光还原催化：末端炔烃的二官能化。2025年7月14日，《中国化学》杂志发表了这一成果。

二氧化碳捕集与利用技术的发展具有重要意义。然而，之前将CO₂转化为化学物质（如CO、HCOOH、CH₄或CH₃OH）的光催化还原反应严重依赖于牺牲试剂。

研究组通过连续光诱导电子转移（ConPET）过程，以CO₂为理想猝灭剂，以杂蒽染料罗丹明6G （Rh-6G）为光催化剂（PC），揭示了一种可见光光氧化催化的末端炔的1,2-二官能化。新开发的CO₂触发反应为多种功能化(E)-α-乙烯基砜提供了高度区域选择性和立体选择性的方法，同时有效地将CO₂转化为草酸盐。这一方案的实用性由生物活性天然产物或药物衍生的炔的后期修饰证明的。初步的机理研究表明，CO₂自由基阴离子的均偶联导致草酸盐的形成。

附：英文原文

Title: Visible Light Photoredox Catalysis with CO2: Difunctionalization of Terminal Alkynes

Author: Jianji Li, Xuming Jiang, Qian Chen, Fei Nie, Shaomin Ji, Yang Gao, Xianwei Li, Yanping Huo

Issue&Volume: 2025-07-14

Abstract: The development of carbon dioxide (CO2) capture and utilization is of vital importance. However, previous photocatalytic reduction reactions for converting CO2 into chemicals (e.g., CO, HCOOH, CH4, or CH3OH) rely heavily on sacrificial reagents. Herein, we disclose a visible light photoredox-catalyzed 1,2-difunctionalization of terminal alkynes by using CO2 as an ideal quenching reagent and the xanthene dye Rhodamine 6G (Rh-6G) as a photocatalyst (PC) via consecutive photoinduced electron transfer (ConPET) process. The newly developed CO2-triggered reaction provides a highly regio- and stereo-selective approach to diverse functionalized (E)-α-vinylsulfones with simultaneously efficient conversion of CO2 into oxalate. The practicality of this protocol is demonstrated by late-stage modification of alkynes derived from biologically active natural products or drugs. Preliminary mechanistic studies suggest that the homocoupling of CO2 radical anion results in the formation of oxalate.

DOI: 10.1002/cjoc.70187

Source: https://onlinelibrary.wiley.com/doi/10.1002/cjoc.70187