Double N,B-Type Bidentate Boryl Ligands Enabling a Highly Active Iridium Catalyst for C–H Borylation
作者:Guanghui Wang、Liang Xu、Pengfei Li
DOI:10.1021/jacs.5b05252
日期:2015.7.1
promise in catalysis due to their very high electron-donating property. In this communication double N,B-type boryl anions were designed as bidentate ligands to promote an sp(2) C-H borylation reaction. A symmetric pyridine-containing tetraaminodiborane(4) compound (1) was readily prepared as the ligand precursor that could be used, in combination with [Ir(OMe)(COD)]2, to in situ generate a highly active
作者:Guobing Yan、Yubo Jiang、Chunxiang Kuang、Shuai Wang、Haichao Liu、Yan Zhang、Jianbo Wang
DOI:10.1039/b926945b
日期:——
Nano-Fe2O3-catalyzed borylation of arenes with diboron pinacol ester B2pin2 has been found to give borylation products with selectivity controlled by electronic effects of substituents.
申请人:Commonwealth Scientific and Industrial Research Organisation
公开号:US06680401B1
公开(公告)日:2004-01-20
The invention relates to processes for the synthesis of aryl or alkene borates which comprises reacting: (i) an olefinic compound having a halogen or halogen-like substituent in a vinylic substitution position, or (ii) an aromatic ring having a halogen or halogen-like substituent in a ring substitution position, with a disubstituted monohydroborane in the presence of a Group 8-11 metal catalyst. The invention also relates to the use of these borates in coupling reactions. The invention further relates to certain disubstituted monohydroboranes and aryl or alkene borates.
active: A silica‐supported “compact” phosphane, Silica‐SMAP, can be used in the Pd‐catalyzedborylation of aryl chlorides or bromides with bis(pinacolato)diboron (see scheme). The Silica‐SMAP/Pd system significantly expands the substrate scope of the borylation toward sterically and electronically challenging arylhalides.