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Comments on the catalytic alkoxycarbonylation of alkynes

Dervisi, Athanasia, Edwards, Peter Gerald, Newman, Paul David, Tooze, Robert P., Coles, Simon J. and Hursthouse, Michael B. 1999. Comments on the catalytic alkoxycarbonylation of alkynes. Journal of the Chemical Society. Dalton Transactions 1999 (7) , pp. 1113-1120. 10.1039/a809624d

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The alkoxycarbonyl complexes Pd(Ph2Ppy)2(CO2R)(OAc) where Ph2Ppy is 2-pyridyldiphenylphosphine and R = Me 1, Et 2, i-Pr 3 have been prepared from Pd(OAc)2 and Ph2Ppy in ethanol solution under an atmosphere of CO. Increasing the CO pressure favours the formation of palladium carbonyl species. In the presence of 2 mol equivalents of CF3CO2H, the complex Pd(Ph2Ppy)2(CO2CH3)(CF3CO2) 4 is isolated from methanol. Pd(Ph2Ppy)2(CO2CH3)Cl 5 has been obtained by the reaction of Pd(Ph2Ppy)2Cl2 with NaOCH3 in the presence of CO. 1 and 5 have been crystallographicaly characterised as trans isomers, a geometry confirmed for all the complexes by 13C NMR. The reactivity of the complexes toward alkynes and propadiene has been investigated and the π-allyl complex [Pd(Ph2Ppy)2{η3-C3H4C(CH3)[double bond, length half m-dash]CH2}][O2CCF3] 8 isolated and structurally characterised.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Publisher: Royal Society of Chemistry
ISSN: 0300-9246
Last Modified: 09 Jun 2020 01:35

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