Journal ArticleDOI
Synthesis, characterization, and application in asymmetric catalysis of dendrimers containing chiral ferrocenyl diphosphines
Christoph Köllner,Antonio Togni +1 more
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Starting from the functionalized Josiphos derivatives (R)-1]-(S)-2-(diphenylphosphino)-1'-(dimethyl-3''-aminopropylsilyl)-ferrocenyl]]-ethyldicyclohexylphphosphine ((R)-(S)3), (R]-1-[(S]-2]-diphensylphophosphino]-1'-hydroxy propyl]ethylldicyl)FERCORENyl] as discussed by the authors, a series of dendrimersAbstract:
Starting from the functionalized Josiphos derivatives (R)-1-[(S)-2-(diphenylphosphino)-1'-(dimethyl-3''-aminopropylsilyl)-ferrocenyl]ethyldicyclohexylphosphine ((R)-(S)-3), (R)-1-[(S)-2-(diphenylphosphino)-1'-(hydroxy methyl) ferrocenyl]ethyldicyclohexylphosphine ((R)-(S)-4), and (R)-1-[(S)-2-(diphenylphosphino)-1'-(3''-hydroxy propyl)ferrocenyl]ethyldicyclohexylphosphine ((R)-(S)-5), a series of dendrimers containing up to sixteen ferrocenyl diphosphine units were prepared. Dendrimer cores are based on benzene 1,3,5-tricarboxylic acid and 1,3,5,7-adaman tanetetracarboxylic acid, with 5-substituted isophthalic acid derivatives constituting the branching units. The dendrimers have been used in three different asymmetric catalytic reactions: Rh-catalyzed hydrogenation of dimethyl itaconate, Pd-catalyzed allylic substitution, and Rh-catalyzed hydroboration of styrene with catecholborane. In all three reactions the selectivity obtained with the dendrimers was very similar to the one obtained with the parent l...read more
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Journal ArticleDOI
The syntheses and catalytic applications of unsymmetrical ferrocene ligands.
TL;DR: A critical review of the synthetic routes that have been applied to the synthesis of unsymmetrical ferrocene ligands, along with a systematic survey of the applications of these ligands in homogeneous catalysis is provided.
Journal ArticleDOI
Catalytic Asymmetric Hydroboration: Recent Advances and Applications in Carbon−Carbon Bond‐Forming Reactions
TL;DR: The metal-catalyzed hydroboration reaction provides access to functionalized organoboron derivatives that cannot be easily prepared using traditional reagents as discussed by the authors, including neoteric reaction media and novel ligands.
Journal ArticleDOI
Cobalt-Catalyzed Enantioselective Hydroboration of 1,1-Disubstituted Aryl Alkenes
TL;DR: The synthesis of cobalt complexes of novel iminopyridine-oxazoline (IPO) ligands and their application to the asymmetric hydroboration of 1,1-disubstituted aryl alkenes is reported and this method is applied to an efficient synthesis of naproxen.
Journal ArticleDOI
Progress in stereoselective catalysis by metal complexes with chiral ferrocenyl phosphines
TL;DR: In this paper, a review covers recent achievements in homogeneous and single-site heterogeneous asymmetric catalysis by metal complexes containing stereohomogeneous ferrocenyl phosphine ligands.
Journal ArticleDOI
Dendritic catalysis: Major concepts and recent progress
Denise Méry,Didier Astruc +1 more
TL;DR: In this paper, the authors present a review of the literature on the use of metallodendrimers in the context of nanosciences, focusing on the potential applications of these materials.
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Journal ArticleDOI
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Journal ArticleDOI
Homogeneous Catalysts Based on Silane Dendrimers Functionalized with Arylnickel(II) Complexes
Joan W. J. Knapen,Alexander Van Der Made,Janine C. de Wilde,Piet W. N. M. van Leeuwen,Peter Wijkens,David M. Grove,Gerard van Koten +6 more
TL;DR: In this paper, the synthesis of polysilane dendrimers (high-branched macromolecules) with metal-containing catalytically active sites is described.
Journal ArticleDOI
A Novel Easily Accessible Chiral Ferrocenyldiphosphine for Highly Enantioselective Hydrogenation, Allylic Alkylation, and Hydroboration Reactions
Journal ArticleDOI
Transition Metal Catalysis Using Functionalized Dendrimers.
TL;DR: The recent progress and breakthroughs made with these promising novel transition metal functionalized dendrimers that are used as catalysts are reviewed, and the architectural concepts that have been applied are discussed.