Copper‐catalyzed/mediated aromatic CH bond functionalization

The CH functionalization strategy has received substantial attention because of its economic, sustainable and environmentally benign features. Most reports are on palladium, rhodium or ruthenium catalysis, and reports on copper catalysis are relatively fewer. Recently, many reports on copper‐catalyzed/mediated CH functionalization have been published. Copper salts bear properties of cheapness and relatively low toxicity. This review introduces an advance on copper‐catalyzed/mediated aromatic CH functionalization. The content includes aromatic ring CH bond functionalization and heteroaromatic CH bond functionalization forming new carbon–carbon or carbon–heteroatom bonds.