N,B-Bidentate Boryl Ligand-Supported Iridium Catalyst for Efficient Functional-Group-Directed C–H Borylation

Convenient silylborane
precursors for introducing N,B-bidentate
boryl ligands onto transition metals were designed, prepared, and
employed in ready formation of irdium­(III) complexes via Si–B
oxidative addition. A practical, efficient catalytic ortho-borylation reaction of arenes with a broad range of directing groups
was developed using an in situ generated catalyst
from the silylborane preligand 3c and [IrCl­(COD)]2.