The Role of Planar Chirality in Asymmetric Catalysis: Improvement of Enantioselectivity in the Addition of Diethylzinc to Aldehydes with Planar Chiral 1,1′-N,O-Ferrocenyl Ligands.

ChemInform ◽  
2004 ◽  
Vol 35 (10) ◽  
Author(s):  
Ming Li ◽  
Ke Yuan ◽  
Yang-Yang Li ◽  
Bo-Xun Cao ◽  
Jie Sun ◽  
...  
Keyword(s):  
Asymmetric Catalysis ◽  
Planar Chirality ◽  
Ferrocenyl Ligands

On the Role of Planar Chirality in Asymmetric Catalysis:  A Study toward Appropriate Ferrocene Ligands for Diethylzinc Additions†

1998 ◽  
Vol 63 (22) ◽  
pp. 7860-7867 ◽  
Author(s):  
Carsten Bolm ◽  
Kilian Muñiz-Fernández ◽  
Andreas Seger ◽  
Gerhard Raabe ◽  
Kurt Günther
Keyword(s):  
Asymmetric Catalysis ◽  
Planar Chirality

New Ferrocenyl Ligands with Broad Applications in Asymmetric Catalysis

2002 ◽  
Vol 114 (24) ◽  
pp. 4902-4905 ◽  
Author(s):  
Matthias Lotz ◽  
Kurt Polborn ◽  
Paul Knochel
Keyword(s):  
Asymmetric Catalysis ◽  
Ferrocenyl Ligands

ROMP-Polymers in Asymmetric Catalysis: The Role of the Polymer Backbone

2002 ◽  
Vol 344 (6-7) ◽  
pp. 649 ◽  
Author(s):  
Carsten Bolm ◽  
Cihangir Tanyeli ◽  
Achim Grenz ◽  
Christian L. Dinter
Keyword(s):  
Asymmetric Catalysis ◽  
Polymer Backbone

Synthesis, characterization, and application in asymmetric catalysis of dendrimers containing chiral ferrocenyl diphosphines

2001 ◽  
Vol 79 (11) ◽  
pp. 1762-1774 ◽  
Author(s):  
Christoph Köllner ◽  
Antonio Togni
Keyword(s):  
Asymmetric Catalysis ◽  
Isophthalic Acid ◽  
Tricarboxylic Acid ◽  
Catalytic Reactions ◽  
Allylic Substitution ◽  
Asymmetric Catalytic ◽  
Ferrocenyl Ligands ◽  
The One ◽  
Parent Ligand ◽  
Dimethyl Itaconate

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 ligand Josiphos.Key words: dendrimer, asymmetric catalysis, ferrocenyl ligands, hydrogenation.

ChemInform Abstract: Dendrimers Based on Cyclophosphazene Units and Containing Chiral Ferrocenyl Ligands for Asymmetric Catalysis.

ChemInform ◽  
2010 ◽  
Vol 31 (10) ◽  
pp. no-no
Author(s):  
Raoul Schneider ◽  
Christoph Koellner ◽  
Immo Weber ◽  
Antonio Togni
Keyword(s):  
Asymmetric Catalysis ◽  
Ferrocenyl Ligands
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