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Carbon-carbon(sp2-sp2 and sp1-sp2) and carbon-nitrogen (nucleophilic allylation) coupling processes are promoted by a catalytic system containing [PdCl(η3-C3H5)]2 with the new ferrocenyl bis(difurylphosphine) 1,1′-bis[di(5-methyl-2-furyl)phosphino]ferrocene, Fc[P(FuMe)2]2. Starting from aryl bromides or allylic acetates this versatile catalyst system may be used at low palladium loadings (10−1-10−4 mol%) in some Heck, Suzuki, Sonogashira and allylic amination reactions to give cross-coupled products in excellent yield. Remarkably high activity is obtained in allylic substitution reactions, providing a significant impetus for the development of bulky phosphines possessing weak σ-donicity for this particular reaction. 相似文献
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Cesar A. Madrigal 《Journal of organometallic chemistry》2008,693(15):2535-2540
The catalytic activity in asymmetric transfer hydrogenation of ketones using octahedral and half-sandwich (η5-indenyl and η6-arene) ruthenium(II) complexes containing the chiral ligand (4S)-2-[(Sp)-2-(diphenylphosphino)ferrocenyl]-4-(isopropyl)oxazoline (FcPN) has been explored. Catalytic studies with complex fac-[RuCl2{η2(P,N)-FcPN}(PMe3)2] (1) show excellent TOF values (9600 h−1). Experiments in the presence of free FcPN, which lead to an increase in conversion rates and ee values when the catalyst is complex [Ru(η5-C9H7){κ2(P,N)-FcPN}(PPh3)][PF6] (4) have been carried out. The characterization of the new complexes mer-trans-[RuCl2{P(OMe)3}2{κ2(P,N)-FcPN}] and of the water-soluble complexes fac- and mer-trans-[RuCl2(PTA)2{κ2(P,N)-FcPN}] is also reported. 相似文献
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