Synthesis of planar chiral cobalt metallocenes by microwave-assisted diastereoselective complexation

Taylor, C. J., Motevalli, M. and Richards, C. J. (2006) Synthesis of planar chiral cobalt metallocenes by microwave-assisted diastereoselective complexation. Organometallics, 25 (11). pp. 2899-2902. ISSN 0276-7333

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Abstract

Ether- and ester-linked diynes were readily synthesized in two steps by starting from secondary terminal propargylic alcohols. On either heat- or microwave-assisted reaction of the diynes with cyclopentadienylcobalt dicarbonyl, new planar chiral (eta(5)-cyclopentadienone)(eta(5)-cyclopentadienyl) cobalt metallocenes were formed with diastereomeric ratios of up to 5:1. For both the ether and ester series the identity of the major isomer was established by X-ray crystallography. The complexation method was shown to be applicable to the synthesis of scalemic planar chiral metallocenes. Preliminary invstigations were carried out to transform the new complexes into other functionalized cobalt metallocenes.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: Rachel Smith
Date Deposited: 21 Feb 2012 11:04
Last Modified: 11 Apr 2019 15:36
URI: https://ueaeprints.uea.ac.uk/id/eprint/37284
DOI: 10.1021/om060015r

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