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Iminophosphine-palladium(0) complexes as catalysts in the alkoxycarbonylation of terminal alkynes |
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| Authors: | A Scrivanti U Matteoli V Beghetto S Antonaroli R Scarpelli B Crociani |
| Institution: | a Dipartimento di Chimica, Università di Venezia, Calle Larga S. Marta Dorsoduro 2137, I-30123 Venezia, Italy b Dipartimento di Scienze e Tecnologie Chimiche, Università di Rome “Tor Vergata”, Via della Ricerca Scientifica, 00133 Rome, Italy |
| Abstract: | In the presence of methanesulfonic acid, the palladium(0)-olefin complexes: Pd(η2-ol)(P---N)] ol=dimethyl fumarate or fumaronitrile, P---N=1-(Ph2P)C6H4-2-CH=NR (R=CMe3 or C6H4OMe-4)] catalyse the alkoxycarbonylation of terminal alkynes. Moderately good rates are obtained when the catalysts are promoted with two equivalents of the free P---N ligand and a large excess of acid at 120°C. The catalytic data suggest that derivatives of the type Pd(alkyne)(P---N)n] (n=2–3) are the active catalytic species. |
| Keywords: | Iminophosphine-palladium(0) complexes Carbonylation Alkynes |
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