Iridium complexes generated from [Ir(OMe)(COD)]2 and tris[3,5-bis(trifluoromethyl)phenyl]phosphine efficiently catalyzed the ortho-CâH borylation of benzoate esters with bis(pinacolato)diboron in octane at 80 °C to produce the corresponding arylboronates in high yields with excellent regioselectivities.
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).
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.
Palladium(II)-Catalyzed Annulation of Alkynes with <i>ortho</i>-Ester-Containing Phenylboronic Acids
作者:Hirokazu Tsukamoto、Yoshinori Kondo
DOI:10.1021/ol701776m
日期:2007.10.1
Palladium(II) catalyzes annulation of internal alkynes with methyl 2-boronobenzoate and (2-boronophenyl)acetate to provide 2,3-disubstituted indenones and 3,4-disubstituted 2-naphthols, respectively. The annulation reaction would proceed through transmetalation of Pd(II) with the boron reagents and insertion of the alkynes, followed by unprecedented 1,2-addition of the generated alkenylpalladium(II) species