Homogeneous catalysis. Metallocene catalysts for [3+2] nitrone-olefin cycloaddition reactions

被引：32

作者：

Ellis, WW

Gavrilova, A

Liable-Sands, L

Rheingold, AL

Bosnich, B

机构：

[1] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

[2] Univ Delaware, Dept Biochem, Newark, DE 19716 USA

来源：

ORGANOMETALLICS | 1999年 / 18卷 / 03期

关键词：

D O I：

10.1021/om980532c

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The complex [Cp2Ti(OTf)(2)] is a catalyst for the [3+2] cycloaddition of nitrones with electron-rich olefins. In the presence of small amounts of water, catalyst hydrolysis leads to the production of triflic acid, which is a powerful catalyst for these cycloaddition reactions. Acid catalysis can be suppressed by the use of Proton-Sponge. Metal catalysis appears to proceed via the bis(nitrone) adduct [Cp2Ti(nitrone)(2)](2+). A crystal structure of one of these adducts is reported.

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页码：332 / 338

页数：7

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