Cp*Rh complexes with pyridyloxazolines: synthesis, fluxionality and applications as asymmetric catalysts for Diels-Alder reactions

被引：20

作者：

Davies, DL ^{[1
]}

Fawcett, J ^{[1
]}

Garratt, SA ^{[1
]}

Russell, DR ^{[1
]}

机构：

[1] Univ Leicester, Dept Chem, Leicester LE1 7RH, Leics, England

来源：

DALTON TRANSACTIONS | 2004年 / 21期

关键词：

D O I：

10.1039/b408921a

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Half-sandwich complexes [RhCl(pymox)Cp*][SbF6] (1-7) (pymox = pyridyloxazoline) have been synthesised as single diastereomers. Treatment of these with AgSbF6 generates dications [Rh(OH2)(pymox)Cp*](2+) which are fluxional at room temperature and which are enantioselective catalysts for the Diels-Alder reaction of methacrolein and cyclopentadiene. Treatment of the dication [Rh(OH2)(Pr-i-pymox)Cp*](2+) with [X](-) gives [RhX(Pr-i-pymox) Cp*][SbF6] (X = Br, I) as single diastereomers whilst reaction with 4-Mepy (4-methylpyridine) gives [Rh(4-Mepy)( Pr-i-pymox)Cp*][SbF6] as a mixture of diastereomers. Two complexes, [RhCl(Pr-i-pymox)Cp*][SbF6] (3) and [RhCl(Bz-pymox)Cp*][SbF6] (6) have been characterised by X-ray crystallography.

引用

页码：3629 / 3634

页数：6

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