Abstract
Reactions that form C–C bonds are at the heart of many important transformations,
both in industry and in academia. From the myriad of catalytic approaches to achieve
such transformations, those relying on C–H functionalization are gaining increasing
interest due to their inherent sustainable nature. In this short review, we showcase
the most recent advances in the field of C–C bond formation via C–H functionalization,
but focusing only on those methodologies relying on copper catalysts. This coinage
metal has gained increased popularity in recent years, not only because it is cheaper
and more abundant than precious metals, but also thanks to its rich and versatile
chemistry.
1 Introduction
2 Cross-Dehydrogenative Coupling under Thermal Conditions
2.1 C(sp3)–C(sp3) Bond Formation
2.2 C(sp3)–C(sp2) Bond Formation
2.3 C(sp2)–C(sp2) Bond Formation
2.4 C(sp3)–C(sp) Bond Formation
3 Cross-Dehydrogenative Coupling under Photochemical Conditions
3.1 C(sp3)–C(sp3) Bond Formation
3.2 C(sp3)–C(sp2) and C(sp3)–C(sp) Bond Formation
4 Conclusion and Perspective
Key words
copper - cross-dehydrogenative coupling - C–H derivatization - oxidants - photocatalysis