Pyridinium-phosphonium dications: highly electrophilic phosphorus-based Lewis acid catalysts

被引：32

作者：

Bayne, Julia M. ^{[1
]}

Holthausen, Michael H. ^{[1
]}

Stephan, Douglas W. ^{[1
]}

机构：

[1] Univ Toronto, Dept Chem, 80 St George St, Toronto, ON M5S 3H6, Canada

来源：

DALTON TRANSACTIONS | 2016年 / 45卷 / 14期

基金：

加拿大自然科学与工程研究理事会;

关键词：

FREE HYDROGEN ACTIVATION; ORGANOFLUOROPHOSPHONIUM SALTS; FLUOROPHOSPHONIUM CATIONS; OLEFINS; HYDROSILYLATION; PAIRS;

D O I：

10.1039/c5dt03796d

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Using commercially available 2-pyridyldiphenylphosphine (o-NC5H4)PPh2, a family of electrophilic phosphonium cations [(o-NC5H4)PFPh2](+) (2) and dications [(o-MeNC5H4)PRPh2](2+) (R = F (4); Me (5)) were prepared. The Lewis acidity of these pyridinium-phosphonium dications was probed in Friedel-Crafts dimerization, hydrodefluorination, hydrosilylation, dehydrocoupling and hydrodeoxygenation reactions. The influence of the counterion on the catalytic activity of the electrophilic phosphonium cations is also discussed.

引用

页码：5949 / 5957

页数：9

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