C–H bond functionalization, which meets with the concept of atom and step economy, has been the hot topic in synthetic chemistry during the past decade. The most representative transition metal-catalyzed C–H bond functionalization usually involves the cleavage of a C–H bond, formation of a C–M bond, and subsequent transformation. Recently, with the fast development of oxidation modes (photo-, electrochemistry), single-electron transfer (SET) oxidation-induced C–H bond functionalization has attracted more and more attention. The substrate molecule is initially oxidized to form radical cation species by losing an electron. Then, the active radical cation can be further functionalized more easily. The feature of SET oxidation-induced C–H bond functionalization provides more opportunities for constructing compounds under mild conditions.

C-H键功能化符合原子和步骤经济的概念，是过去十年合成化学的热门话题。最具代表性的过渡金属催化的 C-H 键官能化通常涉及 C-H 键的断裂、C-M 键的形成以及随后的转化。近年来，随着氧化模式（光化学、电化学）的快速发展，单电子转移（SET）氧化诱导的C-H键功能化引起了越来越多的关注。底物分子最初通过失去一个电子被氧化形成自由基阳离子物质。然后，活性自由基阳离子可以更容易地进一步官能化。SET氧化诱导的C-H键功能化的特点为在温和条件下构建化合物提供了更多机会。