TroposorAtroposNature of Rhodium Complexes Bearing a Tetrakis(phosphanyl)terphenyl Ligand:  Highly Enantioselective Catalysis of Ene-Type Cyclization

2005 ◽  
Vol 7 (26) ◽  
pp. 5777-5780 ◽  
Author(s):  
Koichi Mikami ◽  
Shohei Kataoka ◽  
Kohsuke Aikawa
Keyword(s):  
Enantioselective Catalysis ◽  
Rhodium Complexes

Asymmetrische Katalysen, 13 [1]. Chelat-Liganden und ihre Rhodium-Komplexe mit seitlichen Asymmetriezentren und ihre Anwendung in der enantioselektiven Katalyse / Asymmetric Catalyses. 13 [1]. Chelate Ligands and their Rhodium Complexes with Lateral Asymmetrie Centers and their Use in Enantioselective Catalysis

1983 ◽  
Vol 38 (11) ◽  
pp. 1332-1338 ◽  
Author(s):  
Henri Brunner ◽  
A. F. M. Mokhlesur Rahman
Keyword(s):  
Cinnamic Acid ◽  
Asymmetric Hydrogenation ◽  
Optically Active ◽  
Enantioselective Catalysis ◽  
Rhodium Complexes ◽  
Chelate Ligands

Abstract The chelate ligands 1-3 with lateral asymmetric centers at the nitrogen atoms were prepared and characterized. In the Rh complexes 4 and 5 the asymmetric centers directly interact with those coordination positions where during enantioselective catalysis pro-chiral substrates are converted into optically active products. The compounds 4 and 5, as well as the in situ catalysts [Rh(COD)Cl]2/2 were used in the asymmetric hydrogenation of α-N[acetamino]cinnamic acid and in the asymmetric hydrosilylation of acetophenone with diphenylsilane. The low optical inductions obtained result from the catalyst loosing its chiral information during catalysis due to racemization or fragmentation.

Diphosphinoazine Rhodium(I) and Iridium(I) Complexes

2006 ◽  
Vol 71 (2) ◽  
pp. 197-206 ◽  
Author(s):  
Martin Pošta ◽  
Jan Čermák ◽  
Pavel Vojtíšek ◽  
Ivana Císařová
Keyword(s):  
Rhodium Complexes ◽  
Iridium Complexes ◽  
X Ray ◽  
First Time

The first rhodium complexes of diphosphinoazines [{RhCl(1,2-η:5,6-η-CH=CHCH2CH2CH=CHCH2CH2)}2 {μ-R2PCH2C(But)=NN=C(But)CH2PR2] (R = Ph, Cy, Pri) were prepared by cleavage of the bridge in chloro(cycloocta-1,5-diene)rhodium(I) dimer, the analogous iridium(I) complexes were also prepared for the first time. The X-ray structures of isostructural rhodium and iridium complexes with bis(dicyclohexylphosphino)pinacoloneazine were determined. Diphosphinoazine ligands in the complexes remained in (Z,Z) configuration bridging two RhCl(C8H12) units.

scholarly journals Platinum and rhodium complexes ligated by imidazolium-substituted phosphine as efficient and recyclable catalysts for hydrosilylation

RSC Advances ◽  
2019 ◽  
Vol 9 (50) ◽  
pp. 29396-29404 ◽  
Author(s):  
Magdalena Jankowska-Wajda ◽  
Olga Bartlewicz ◽  
Andrea Szpecht ◽  
Adrian Zajac ◽  
Marcin Smiglak ◽  
...  
Keyword(s):  
Rhodium Complexes ◽  
Recyclable Catalysts ◽  
High Yields

Platinum and rhodium complexes ligated by imidazolium substituted phosphine were obtained with high yields and applied as efficient catalysts.

Heterogeneous Enantioselective Catalysis with Chiral Encoded Mesoporous Pt−Ir Films Supported on Ni Foam

2021 ◽  
Author(s):  
Sunpet Assavapanumat ◽  
Sopon Butcha ◽  
Somlak Ittisanronnachai ◽  
Alexander Kuhn ◽  
Chularat Wattanakit
Keyword(s):  
Enantioselective Catalysis ◽  
Ni Foam
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