Transition metal-catalyzed directed C–H activation has emerged as an increasingly powerful tool for the synthesis of important organic building blocks, organic materials and natural products. Despite the great advances in the past decades, the majority of C–H functionalization systems focus on aryl C–H activation. Given the wide presence of alkenes as substrates, olefinic C–H functionalization, which is a step-economic process, is highly desirable for the construction of functional olefins. Herein, we summarize the recent advances during 2015–2020 in the field of metal-catalyzed olefinic C–H functionalization. This review is organized according to the metal center of the catalyst, with an emphasis on the similarities and differences among different catalysts in olefinic C–H functionalization.

中文翻译：

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过渡金属催化的C–H烯烃官能化的最新进展

过渡金属催化的定向C–H活化已成为合成重要有机结构单元，有机材料和天然产物的日益强大的工具。尽管在过去几十年中取得了长足的进步，但大多数C–H官能化系统仍侧重于芳基C–H活化。考虑到烯烃作为底物的广泛存在，烯烃的C–H官能化是一种分步经济的方法，对于功能性烯烃的构建非常需要。本文中，我们总结了2015年至2020年期间金属催化的烯烃CHH功能化领域的最新进展。这项综述是根据催化剂的金属中心进行的，重点是烯烃C–H官能化过程中不同催化剂之间的异同。