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- W1998716441 abstract "Abstract A combined ESI‐MS/NMR mechanistic study on the palladium‐catalysed cross‐coupling reaction between aryldiazonium salts and aryltrifluoroborates with bis(μ‐acetato)bis(4,4′‐difluoroazobenzene‐ C 2 , N )dipalladium(II) ( 4 ) as the precatalyst is reported. The reaction follows a Pd 0 /Pd II cycle after reduction of 4 to a molecular Pd 0 species ( I ), which according to the combined ESI‐MS and 19 F NMR studies, bears an arylated azobenzene ligand. Oxidative addition by the diazonium salt generates the arylpalladium(II) intermediate ( II ), which was also detected in solution. The catalytic cycle is completed with a transmetallation between II and theorganoborate, which is followed by fast reductive elimination of the cross‐coupling product to restore the molecular Pd 0 species I . A concurrent activation path was also observed which consists of the formation of (4,4′‐difluoroazobenzene‐ C 2 , N )dipalladium(II) tetrafluoroborate ( 7 ) by the reaction of 4 with the diazonium salt and subsequent reduction by the aryltrifluoroborate to give I . (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)" @default.
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- W1998716441 date "2007-09-25" @default.
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- W1998716441 title "On the Mechanism of Palladium‐Catalyzed Cross‐Coupling of Diazonium Salts with Aryltrifluoroborates: A Combined ESI‐MS/NMR Study" @default.
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- W1998716441 doi "https://doi.org/10.1002/ejic.200700532" @default.
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