Nickel catalysis is a well-established and powerful tool for C–C cross-coupling reactions, and its versatility has expanded significantly over past decades by its combination with visible-light photocatalysis in metallaphotoredox chemistry. Photocatalysis enables the activation of traditionally inert substrates and turnover of the Ni catalyst through a single-electron transfer processes. In recent years, dual catalysis has been further empowered by photoactive Ni intermediates, which exhibit distinct reactivity profiles from their ground states and complement existing protocols. This short review focuses on the emergent subclass of metallaphotoredox catalysis in which the synergy of a photoactive Ni catalyst and a typical photocatalyst (e.g., a polypyridyl Ir complex) provide solutions to challenging C–C bond formation.

1 Introduction

2 Photoactive Nickel Complexes

3 HAT-Mediated C–C Cross-Coupling

4 Halofunctionalization of π-Systems

5 Photoelimination of an Aryl Radical

6 Conclusion

镍催化是一种成熟且强大的 C-C 交叉偶联反应工具，在过去几十年中，通过与金属光氧化还原化学中的可见光光催化相结合，其多功能性显着扩展。光催化能够通过单电子转移过程激活传统惰性底物和镍催化剂的周转。近年来，光活性镍中间体进一步增强了双重催化作用，其表现出与其基态不同的反应性特征，并补充了现有的方案。这篇简短的综述重点关注金属光氧化还原催化的新兴子类，其中光活性镍催化剂和典型光催化剂（例如聚吡啶基铱配合物）的协同作用为具有挑战性的C-C键形成提供了解决方案。

1 简介

2 光活性镍配合物

3 HAT 介导的 C-C 交叉偶联

4 π-系统的卤代功能化

5 芳基自由基的光消除

六，结论