Lewis Base Activation of Lewis Acids: Group 13. In Situ Generation and Reaction of Boreniunn Ions

被引：37

作者：

Denmark, Scott E. ^{[1
]}

Ueki, Yusuke ^{[1
]}

机构：

[1] Univ Illinois, Dept Chem, Roger Adams Lab, Urbana, IL 61801 USA

来源：

ORGANOMETALLICS | 2013年 / 32卷 / 22期

基金：

美国国家卫生研究院; 日本学术振兴会;

关键词：

CATALYSIS; MECHANISM; HYDROSILYLATION; HYDROSILATION; THIIRANIUM; CHEMISTRY; BORINIUM;

D O I：

10.1021/om400582k

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A variety of Lewis bases were combined with 9-BBN-NTf2 to establish the requirements for the generation of borenium cations. Five different types of behaviors were found, but the most interesting was the combination of Et3N, DABCO, 2,6-lutidine, or Ph3P=S, which formed borenium ions exclusively even in sub- or superstoichiometric quantities. The 9-BBN borenium ion complex of 2,6-lutidine rapidly catalyzes the hydrosilylation of a variety of ketones in the presence of Et3SiH. Preliminary mechanistic experiments suggest that the reduction involves borenium ion activation of Et3SiH and not the ketone.

引用

页码：6631 / 6634

页数：4

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