Abstract
Palladium complexes of the type [Pd(L)Cl(PPh3)]Cl (L = 2-diphenylphosphinoamino)pyrimidine, or 2-diphenylphosphinoaniline), generated in situ by addition of one equivalent of PPh3 to the corresponding neutral complexes [Pd(L)Cl2], were tested as catalysts for the methoxycarbonylation of styrene. The catalyst containing the pyrimidinyl ligand shows almost complete chemo- and regioselectivity together with a high conversion rate. However, in identical conditions, the [Pd(Ph2PNHC6H4PPh2)Cl2] complex, where the P,N-ligand has been replaced by a related bidentate P-donor one, shows a significantly lesser performance.
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Acknowledgments
We are grateful for the financial support provided by Fondecyt-Chile (Grant 1120149) and to Daniel Peral (UAB) for his valuable comments.
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Abarca, G., Brown, K., Moya, S.A. et al. Methoxycarbonylation of Styrene Using a New Type of Palladium Complexes Bearing P,N-donor Ligands as Catalysts. Catal Lett 145, 1396–1402 (2015). https://doi.org/10.1007/s10562-015-1502-y
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DOI: https://doi.org/10.1007/s10562-015-1502-y