Rhodium-Catalyzed C–B Bond Formation

This chapter focuses on Rh-activation of boron-based reagents and its assistance in efficient catalytic borylation reactions. The introduction is a critical reflection of the importance that hydroborane reagents have had in reactions such as Rh-catalyzed hydroboration for the last 30 years. The next section shows a brief history of the Rh–B bond formation from Rh complexes and diboron reagents. The most relevant advances in Rh-catalyzed diboration are summarized in the following section. In the fourth section, examples of Rh-catalyzed β-boration of α,β-unsaturated substrates are collected, completing the fifth section with a description and comments about the new trends on Rh-catalyzed C–H and C–X borylation. At the end of this chapter, the authors compile a summary and their perspective for the related field from a mechanistic point of view.