Room temperature borylation of arenes and heteroarenes using stoichiometric amounts of pinacolborane catalyzed by iridium complexes in an inert solventElectronic supplementary information (ESI) available: experimental procedures and spectral analyses of products. See http://www.rsc.org/suppdata/cc/b3/b311103b/
<i>meta</i>
‐Nitration of Arenes Bearing
<i>ortho</i>
/
<i>para</i>
Directing Group(s) Using C−H Borylation
作者:Xuejing Li、Xingwang Deng、Anthony G. Coyne、Rajavel Srinivasan
DOI:10.1002/chem.201901633
日期:2019.6.18
of arenes bearing ortho/para directing group(s) using the iridium‐catalyzed C−H borylation reaction followed by a newly developed copper(II)‐catalyzed transformation of the crude aryl pinacol boronate esters into the corresponding nitroarenes in a one‐pot fashion. This protocol allows the synthesis of meta‐nitrated arenes that are tedious to prepare or require multistep synthesis using the existing
OXIDATIVE COUPLING OF ARYL BORON REAGENTS WITH SP3-CARBON NUCLEOPHILES, AND AMBIENT DECARBOXYLATIVE ARYLATION OF MALONATE HALF-ESTERS VIA OXIDATIVE CATALYSIS
申请人:The Governors of the University of Alberta
公开号:US20180186721A1
公开(公告)日:2018-07-05
Described herein are methods of oxidative coupling of aryl boron reagents with sp
3
-carbon nucleophiles, and ambient decarboxylative arylation of malonate half-esters via oxidative catalysis.
Conversion of pinacol arylboronic esters 3 to aryl triolborates 5 via transesterification with 1,1,1-tris(hydroxymethyl)ethane (4) was established with the advantages of tolerance to various functional groups. Transesterification was carried out at 30–60 °C in dioxane in the presence of MOH (M = Na and K) and H2O. High yields were achieved for stable aryl triolborates 5.
Sterically Controlled Alkylation of Arenes through Iridium-Catalyzed CH Borylation
作者:Daniel W. Robbins、John F. Hartwig
DOI:10.1002/anie.201208203
日期:2013.1.14
one‐pot method for the site‐selective alkylation of arenes controlled by steric effects is reported. The process occurs through Ir‐catalyzed CHborylation, followed by Pd‐ or Ni‐catalyzed coupling with alkyl electrophiles. This selectivity complements that of the typical Friedel–Crafts alkylation; meta‐selective alkylation of a broad range of arenes with various electronic properties and functional
NNB-Type Tridentate Boryl Ligands Enabling a Highly Active Iridium Catalyst for C–H Borylation
作者:Siyi Ding、Linghua Wang、Zongcheng Miao、Pengfei Li
DOI:10.3390/molecules24071434
日期:——
Boryl ligands play a very important role in catalysis because of their very high electron-donating property. In this paper, NNB-type boryl anions were designed as tridentate ligands to promote aryl C–H borylation. In combination with [IrCl(COD)]2, they generate a highlyactive catalyst for a broad range of (hetero)arene substrates, including highly electron-rich and/or sterically hindered ones. This