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Transition-Metal-Catalyzed Direct Arylation of (Hetero)Arenes by C[BOND]H Bond Cleavage

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Abstract

The area of transition-metal-catalyzed direct arylation through cleavage of C[BOND]H bonds has undergone rapid development in recent years, and is becoming an increasingly viable alternative to traditional cross-coupling reactions with organometallic reagents. In particular, palladium and ruthenium catalysts have been described that enable the direct arylation of (hetero)arenes with challenging coupling partners—including electrophilic aryl chlorides and tosylates as well as simple arenes in cross-dehydrogenative arylations. Furthermore, less expensive copper, iron, and nickel complexes were recently shown to be effective for economically attractive direct arylations.

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