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Issue 43, 2009
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Ruthenium alkynyl, carbene and alkenyl complexes containing pendant uracilgroups: an investigation into the formation of alkenyl-phosphonio complexes

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Abstract

The vinylidene complex [Ru(η5-C5H5)(PPh3)2([double bond, length as m-dash]C[double bond, length as m-dash]CHUr)][X] (X = PF6, OTf, Ur = uracil) is a versatile precursor for a range of organometallic complexes containing pendant uracil groups. Using appropriate conditions the vinylidene complex may be selectively transformed into alkynyl Ru(–C[triple bond, length as m-dash]CUr)(η5-C5H5)(PPh3)2, carbene [Ru(η5-C5H5)(PPh3)2([double bond, length as m-dash]C{OMe}–CH2Ur)][X] and alkenyl-phosphonio species [Ru(E-CH[double bond, length as m-dash]C{PPh3}Ur)(η5-C5H5)(PPh3)2][X]. The synthesis of the related alkenyl-phosphonio complexes [Ru(E-CH[double bond, length as m-dash]C{PPh3}R)(η5-C5H5)(PPh3)2][X] (R = Ph, C6H4-3-OMe) is described; these undergo a further orthometallation reaction: the mechanism of this latter reaction appears to proceed via dissociation of a ruthenium-bound PPh3 ligand.

Graphical abstract: Ruthenium alkynyl, carbene and alkenyl complexes containing pendant uracil groups: an investigation into the formation of alkenyl-phosphonio complexes

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Article information


Submitted
30 Jun 2009
Accepted
17 Aug 2009
First published
18 Sep 2009

Dalton Trans., 2009, 9529-9542
Article type
Paper

Ruthenium alkynyl, carbene and alkenyl complexes containing pendant uracil groups: an investigation into the formation of alkenyl-phosphonio complexes

M. J. Cowley, J. M. Lynam, R. S. Moneypenny, A. C. Whitwood and A. J. Wilson, Dalton Trans., 2009, 9529
DOI: 10.1039/B912855G

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