Cobalt-Catalyzed C(sp2)-H Borylation with an Air-Stable, Readily Prepared Terpyridine Cobalt(II) Bis(acetate) Precatalyst

被引：65

作者：

Leonard, Nadia G. ^{[1
]}

Bezdek, Mate J. ^{[1
]}

Chirik, Paul J. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

来源：

ORGANOMETALLICS | 2017年 / 36卷 / 01期

基金：

美国国家科学基金会;

关键词：

C-H BORYLATION; ALKENE HYDROBORATION; ROOM-TEMPERATURE; BOND FUNCTIONALIZATION; ELECTRONIC-STRUCTURES; COUPLING REACTION; TERTIARY SILANES; COMPLEXES; ARENES; LIGANDS;

D O I：

10.1021/acs.organomet.6b00630

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A bench-stable, 4-aryl-substituted terpyridine supported, high-spin cobalt(II) bis(acetate) complex, ((Ar)Tpy)Co-(OAc)(2) ((Ar)Tpy = 4'-(4-N,N'-dimethylaminopheny1)-2,2':6',2 ''-terpyridine), is active for the C(sp(2))-H borylation of arenes and heteroarenes with B(2)Pin(2) (Pin = pinacolato). Optimization of the catalytic borylation reaction revealed improved performance in the presence of LiOMe and turnover numbers of up to 100 have been observed using all air-stable components. EPR specstroscopy identified formation of inactive cobalt species, promoted by excess HBPin. A high-spin cobalt(II) bis[(diacetoxy)-pinacolatoborate-kappa O-3,O,O] compound has been isolated and characterized by X-ray diffraction and is the result of catalyst deactivation.

引用

页码：142 / 150

页数：9

共 30 条

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