Advances in Nitrogen-Directed Aromatic Compound ortho-C—H Bond Borylation Catalyzed by Transition Metals

Aromatic boron compounds have been widely used in synthetic chemistry, materials and medicinals, and developing new methods for their synthesis has been a hot topic.Directing groups assisted C-H bond borylation catalyzed by transition metal has significant advantages in step-economy, substrates diversity and high regio-selectivity.The borylation of nitrogen-based substrates has attracted interest from researchers, because four-coordinated organoboron compounds chelated by N,C are important photoelectric materials.In this paper, the preparation of aromatic boron compounds from ortho-C-H bond borylation catalyzed by Ir, Rh, Ru, Pd assisting by directing groups containing nitrogen atoms is summarized.