Abstract
Direct carbon–hydrogen bond functionalization has attracted considerable attention and plays a key role in organic transformations. Currently, copper is showing great potential as a catalyst in C–H bond-functionalization reactions because of its low cost and unique reactivity. This review summarizes the recent advances in copper-catalyzed C–H bond functionalizations from carbon–carbon and carbon–heteroatom (O, N and S) bond-forming reactions through activation of C–H bonds. 1 Introduction 2 Carbon–Carbon Bond Formation 2.1 Csp–H Bond Functionalization 2.2 Csp2–H Bond Functionalization 2.3 Csp3–H Bond Functionalization 3 Carbon–Heteroatom Bond Formation 3.1 Carbon–Oxygen Bond Formation 3.2 Carbon–Nitrogen Bond Formation 3.3 Carbon–Sulfur Bond Formation 4 Conclusion
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