- Reaction of trimethylaluminium with main group hydroxides: A non-hydrolysis route to methylalumoxane
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Reaction of AlMe3 with [(tBu)2Ga(μ-OH)]3 or Ph3EOH (E = Sn, Pb) yields catalytically active MAO, [MeAlO]n, along with (tBu)2GaMe and Ph3EMe, respectively, in contrast, the reaction with Ph3EOH (E = C, Si, Ge) yields [Me2Al(μ-OEPh3)]2; the formation of MAO is proposed to occur via hydroxide exchange and the formation of unstable [Me2Al(μ-OH)]n; the propensity towards alkane elimination versus hydroxide exchange is controlled by the relative Bronsted acidity of the main group hydroxide.
- Obrey,Barron
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p. 2456 - 2458
(2007/10/03)
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- New Reagents, XXX: Synthesis and Stability of Bis(triphenylplumbyl)methyllithium and Reactions with Alkyl Halides, Carbonyl Compounds, and Oxiranes
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Bis(triphenylplumbyl)methyllithium (2) is easily accessible by plumbyl-Li or Br-Li exchange from tris(triphenylplumbyl)methane (1b) and bromobis(triphenylplumbyl)methane (3), respectively.Due to its stability and high nucleophilicity 2 is a good reagent for the synthesis of bis(plumbyl)alkanes, -β-hydroxyalkanes, and -γ-hydroxyalkanes.
- Kauffmann, Thomas,Rensing, Alfons
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p. 380 - 390
(2007/10/02)
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- New Reagents, XXIX: Synthesis, Stability, and Preparative Applications of (Triphenylplumbyl)methyllithium
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(Triphenylplumbyl)methyllithium (2), obtained from well accessible starting compounds by iodine-Li- or plumbyl-Li exchange, is applied as a reagent for the introduction of the (triphenylplumbyl)methyl group into alkyl halides, aldehydes, ketones, oxiranes, and organoelement halides.
- Kauffmann, Thomas,Kriegesmann, Reinhard,Rensing, Alfons,Koenig, Rolf,Steinseifer, Fritz
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p. 370 - 379
(2007/10/02)
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