Transition‐metal‐catalyzed C−H functionalization has been a hot topic in organic chemistry over the past decade. The convergence of photocatalysis and C−H functionalization is undoubtedly a promising strategy to solve the challenges in this area as photoinduced electron transfer represents another avenue for the activation of C−H bonds. In addition to the common merits of mild reaction conditions and good site selectivity, organic photoredox catalysts are superior to the transition metal photocatalysts (predominantly Ru‐ and Ir‐based polypyridyl complexes) in the following aspects: no potential transition metal contamination, low price, more candidates, and higher reactivity, and so forth. In this Focus Review, we concentrate on bond‐forming reactions by oxidative cross‐coupling using organic photoredox catalysts. Achievements on C−C and C−X (N, O, F, P, S, Cl, or Br) bond‐forming reactions made in recent years are summarized.

中文翻译：

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可见光诱导的C-H官能化和C-C / C-X键形成的氧化交叉偶联反应

在过去的十年中，过渡金属催化的CH官能化一直是有机化学中的热门话题。光催化和CH功能化的融合无疑是解决该领域挑战的一种有前途的策略，因为光诱导的电子转移代表了CH键活化的另一条途径。除了温和的反应条件和良好的位点选择性的共同优点外，有机光氧化还原催化剂在以下方面还优于过渡金属光催化剂（主要是Ru和Ir基聚吡啶基配合物）：无潜在的过渡金属污染，价格低廉，更多的候选人，更高的反应性，等等。在本《焦点回顾》中，我们重点介绍了使用有机光氧化还原催化剂通过氧化交叉偶联进行的键形成反应。在C-C和C-X（N，O，