N,B-Bidentate Boryl Ligand-Supported Iridium Catalyst for Efficient Functional-Group-Directed C–H Borylation
作者:Guanghui Wang、Li Liu、Hong Wang、You-Song Ding、Jing Zhou、Shuai Mao、Pengfei Li
DOI:10.1021/jacs.6b11867
日期:2017.1.11
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).
Ester-Directed Regioselective Borylation of Heteroarenes Catalyzed by a Silica-Supported Iridium Complex
The ester-directed regioselective borylation of arenes catalyzed by a silica-supported monophosphine-Ir complex displayed a significantly broad substrate scope toward heteroaromatic compounds, including thiophene. pyrrole, furan, benzothiophene, benzofuran, indole, and carbazole derivatives. The regioselectivity is complementary to the selectivities observed in the heteroarene C-H borylation with the dtbpy-Ir catalyst system.
A new air-stable Si,S-chelating ligand for Ir-catalyzed directed <i>ortho</i> C–H borylation
作者:Jiao Jiao、Wenzheng Nie、Peidong Song、Pengfei Li
DOI:10.1039/d0ob02335c
日期:——
reaction with a broad substrate scope. This study provides the first example of using a sulfur-containing ligand in the catalytic C–H borylation process. It provides a rapid, efficient, and economicalmethod for the preparation of organoboron compounds.