Tartrate-derived cyclopentadienes for the synthesis of chiral substituted (η5-cyclopentadiene)(η4-cycloocta-1,5-diene)cobalt(I) complexes

被引：31

作者：

Gutnov, A ^{[1
]}

Heller, B ^{[1
]}

Drexler, HJ ^{[1
]}

Spannenberg, A ^{[1
]}

Oehme, G ^{[1
]}

机构：

[1] Univ Rostock, Leibniz Inst Organ Katalyse, D-18055 Rostock, Germany

来源：

ORGANOMETALLICS | 2003年 / 22卷 / 07期

关键词：

D O I：

10.1021/om020982b

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two chiral tartrate-derived ligands, the disubstituted cyclopentadiene 1 and the new tetrasubstituted cyclopentadiene 2, are obtained. The corresponding (eta(5)-cyclopentadiene)(eta(4)-cycloocta-1,5-diene)cobalt(I) complexes 3 and 4 are prepared through the deprotonation of the ligands with lithium diisopropylamide followed by the metathetic reaction of the lithium salts with tris(triphenylphosphine)cobalt(I) chloride and 1,5-cyclooctadiene. The complexes are isolated in an enantiomerically pure state after chromatography with dried silica under argon. The structures of 2-4 have been determined by single-crystal X-ray diffractometry. The dynamic behavior of complexes 3 and 4 in solution is discussed on the basis of H-1 and C-13 NMR spectra.

引用

页码：1550 / 1553

页数：4

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