In recent decades, cobalt catalyst has represented a powerful strategy for developing common organic reactions. This review includes the most recent efforts of Co catalysts applications in selective organic reactions such as C–H & C—X activation, hydrogenation & dehydrogenation, and cycloaddition. The contribution of cobalt salt or earth-abundant cobalt complexes usually accomplishes these reactions. It mainly involves different fundamental reaction paths, such as the concerted metalation-deprotonation (CMD) path associated with non-oxidative C–H activation and the intermolecular single-electron transfer (SET) path. Here, we summarize the advances of Co catalyst applications in three main sections: (i) C–H & C—X activation, (ii) hydrogenation-dehydrogenation, and (iii) cycloaddition. The characteristics of each catalyst are discussed according to parameters such as efficiency, recyclability, catalyst life, lack of catalyst nanoparticles agglomeration, and required time of catalyst effects on the reactions.

近几十年来，钴催化剂代表了开发常见有机反应的强大策略。这篇综述包括 Co 催化剂在选择性有机反应（例如 C–H 和 C–X 活化、加氢和脱氢以及环加成反应）中应用的最新成果。钴盐或地球上丰富的钴配合物的作用通常可以完成这些反应。它主要涉及不同的基本反应路径，例如与非氧化性 C-H 活化相关的协同金属化-去质子化 (CMD) 路径和分子间单电子转移 (SET) 路径。在这里，我们在三个主要部分总结了 Co 催化剂应用的进展：(i) C-H 和 C-X 活化，(ii) 加氢-脱氢，以及 (iii) 环加成。