Issue 4, 2004
From the journal:

New Journal of Chemistry

Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyne†

Vladimir B. Golovko,a   Louisa J. Hope-Weeks,b   Martin J. Mays,*a   Mary McPartlin,c   Anna M. Sloana  and  Anthony D. Woods*a  

* Corresponding authors

a Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge
E-mail: adw24@cus.cam.ac.uk; mjm14@cus.cam.ac.uk

b University of California, Lawrence Livermore National Laboratory, Division of Chemistry and Chemical Engineering, Livermore, USA

c Department of Health and Human Sciences, London Metropolitan University, London, UK

Abstract

The acid-catalysed Nicholas reaction of the bis-propargyl complex [{Co2(CO)6(μ-η2-HOMe2CC[triple bond, length as m-dash]C–)}2] 1 in the presence of a variety of nucleophiles leads in each case to [{Co2(CO)6}2{cyclo-μ-η2:μ-η2-C([double bond, length as m-dash]CH2)CH2CMe2C[triple bond, length as m-dash]C–C[triple bond, length as m-dash]C}], a complex which contains an unprecedented seven-membered macrocyclic diyne ligand. The reactivity of 1 is compared to that of [{Co2(CO)6}2{μ-η2:μ-η2-1,4-C6H4(C[triple bond, length as m-dash]CCMe2OH)2}] which does not cyclise on treatment with nucleophiles but instead gives the expected substitution products.

Graphical abstract: Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyne

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Article information

DOI
https://doi.org/10.1039/B310515F
Article type
Paper
Submitted
29 Aug 2003
Accepted
14 Jan 2004
First published
03 Mar 2004

New J. Chem., 2004,28, 527-534

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Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyne

V. B. Golovko, L. J. Hope-Weeks, M. J. Mays, M. McPartlin, A. M. Sloan and A. D. Woods, New J. Chem., 2004, 28, 527 DOI: 10.1039/B310515F

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