Contrasting Reactivity of Fluoropyridines at Palladium and Platinum: C−F Oxidative Addition at Palladium, P−C and C−F Activation at Platinum
作者:Naseralla A. Jasim、Robin N. Perutz、Adrian C. Whitwood、Thomas Braun、Joseph Izundu、Beate Neumann、Sascha Rothfeld、Hans-Georg Stammler
DOI:10.1021/om049448p
日期:2004.12.1
behavior of palladium(0) and platinum(0) is revealed in the reactivity of [M(PR3)2] (M = Pd or Pt; R = Cy or iPr) toward pentafluoropyridine and 2,3,5,6-tetrafluoropyridine. The palladiumcomplexes react with pentafluoropyridine at 100 °C to yield the fluoride complexes trans-[Pd(F)(4-C5NF4)(PR3)2]. They do not react with 2,3,5,6-tetrafluoropyridine. The reaction of platinum(0) complexes [Pt(PR3)2] with
Reactivity of a palladium fluoro complex towards silanes and Bu<sub>3</sub>SnCHCH<sub>2</sub>: catalytic derivatisation of pentafluoropyridine based on carbon–fluorine bond activation reactions
The chloro and azido complexes trans-[PdCl(4-C5NF4)(PiPr3)2] (3) and trans-[Pd(N3)(4-C5NF4)(PiPr3)2] (4) can be prepared by reaction of [PdF(4-C5NF4)(PiPr3)2] (2) with Et3SiCl or MeSiN3, respectively. In contrast, reactions of 2 with Ph3SiH or Me2FSiSiFMe2 give the products of reductive elimination 2,3,5,6-tetrafluoropyridine (5) or 4-(fluorodimethylsilyl)tetrafluoropyridine (6) as well as [Pd(PiPr3)2]
Isolation and reactivity of palladium hydrido complexes: intermediates in the hydrodefluorination of pentafluoropyridine
作者:David Breyer、Thomas Braun、Anna Penner
DOI:10.1039/c0dt00086h
日期:——
The hydridocomplexes trans-[Pd(H)(4-C5NF4)(PiPr3)2] (3) and trans-[Pd(H)(4-C5NF4)(PCy3)2] (5) can be prepared by reaction of trans-[Pd(F)(4-C5NF4)(PiPr3)2] (2) or trans-[Pd(F)(4-C5NF4)(PCy3)2] (4) with HBpin (HBpin = 4,4,5,5-tetramethyl-1,3,2-dioxaborolane, pinacolborane). The iodo and triflato complexes trans-[Pd(I)(4-C5NF4)(PiPr3)2] (7) and trans-[Pd(OTf)(4-C5NF4)(PiPr3)2] (9) are generated on treatment
Synthesis and Reactivity of the Fluoro Complex <i>trans</i>-[Pd(F)(4-C<sub>5</sub>NF<sub>4</sub>)(<sup><i>i</i></sup>Pr<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>OCH<sub>3</sub>)<sub>2</sub>]: C–F Bond Formation and Catalytic C–F Bond Activation Reactions
作者:David Breyer、Thomas Braun、Paul Kläring
DOI:10.1021/om200998d
日期:2012.2.27
formation of the palladium(0) complex [Pd(iPr2PCH2CH2OCH3)2] (1). Treatment of 1 with pentafluoropyridine at room temperature yielded the C–Factivation product trans-[Pd(F)(4-C5NF4)(iPr2PCH2CH2OCH3)2] (2). The triflato and bromo complexes trans-[Pd(OTf)(4-C5NF4)(iPr2PCH2CH2OCH3)2] (4) and trans-[Pd(Br)(4-C5NF4)(iPr2PCH2CH2OCH3)2] (5) could be prepared on reaction of complex 2 with EtOTf or 3-bromopropene