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Title: Cyclopalladated Compounds with Polyhalogenated Benzylphosphanes for the Mizoroki-Heck Reaction
Author: López-Mosquera, C.
Grabulosa, Arnald
Rocamora, Mercè
Font Bardia, Ma. Mercedes
Muller, G.
Keywords: Pal·ladi (Element químic)
Lligands (Bioquímica)
Ligands (Biochemistry)
Issue Date: 27-May-2020
Publisher: Wiley-VCH
Abstract: Nine partially halogenated benzylphosphanes ArXCH2PR2 (ArX = 3,6-dichlorophenyl, 3,6- difluorophenyl and 3,4,5-trifluorophenyl; R = Ph, Cy, iPr) have been prepared and reacted with palladium acetate to obtain the cyclometallated dimers [Pd(μ-OAc)(κ2-C,P-ArXCH2PR2)]2. The acetate bridge has been exchanged by bromide using lithium bromide and the obtained dimers have been thoroughly characterised. The dimers with the non-halogenated phosphanes PhCH2PR2 (R = Ph, iPr) have also been prepared. Treatment with norbornadiene in the presence of silver tetrafluoroborate has furnished the cationic mononuclear complexes [Pd(κ2-C,P-ArXCH2PR2)(nbd)]BF4 as stable solids. These complexes and some of the bromide dimers have been used as catalytic precursors in the Mizoroki- Heck reaction between bromobenzene and butyl acrylate. The complexes efficiently catalyse this transformation and important differences of activity are found depending on the ligand. In general, fluorinated phosphanes give more active systems than chlorinated analogues.
Note: Versió postprint del document publicat a:
It is part of: European Journal of Inorganic Chemistry, 2020, vol. 2020, num. 25, p. 2470-2484
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ISSN: 1434-1948
Appears in Collections:Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

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