<scp>Iron‐Catalysed</scp>
C(sp
<sup>2</sup>
)‐H Borylation with Expanded Functional Group Tolerance
<sup>†</sup>
作者:Luke Britton、Jamie H. Docherty、Gary S. Nichol、Andrew P. Dominey、Stephen P. Thomas
DOI:10.1002/cjoc.202200465
日期:2022.12.15
efficient access to aryl boronic esters. Using in situ catalyst activation and photoirradiation, the iron-catalysed C(sp2)-H borylation reaction of carboarenes, pyrroles, and indoles has been developed using only bench-stable pre-catalysts and reagents. Good functional group tolerance was observed including those not reported using previous methods (ArNH2, ArOH, ArSiR3, ArP(O)(OR)2, ArC(O)NR2). Mechanistic
Development of recyclable iridium catalyst for C–H borylation
作者:Tsuyoshi Tagata、Mayumi Nishida、Atsushi Nishida
DOI:10.1016/j.tetlet.2009.08.080
日期:2009.11
Aromatic C-H borylation using [IrCl(COD)](2) and 2.2'-bipyridinedicarboxylic acids was studied. 2,2'-Bipyridine-4,4'-dicarboxylic acid was complexed with [IrCl(COD)](2) in the presence of bis(pinacolato)diboron. The resulting iridium catalyst could be readily separated from the reaction mixture by simple filtration, and the recovered catalyst under a nitrogen atmosphere was still active and could be reused more than 10 times. (C) 2009 Elsevier Ltd. All rights reserved.