Enantiomerically Pure P,N Chelates Based on Phospholene Rings: Palladium Complexes and Catalytic Applications in Allylic Substitution

2009 ◽  
Vol 2009 (36) ◽  
pp. 5583-5591 ◽  
Author(s):  
François Leca ◽  
Fernando Fernández ◽  
Guillermo Muller ◽  
Christophe Lescop ◽  
Régis Réau ◽  
...  
Keyword(s):  
Palladium Complexes ◽  
Allylic Substitution ◽  
Enantiomerically Pure ◽  
Catalytic Applications

Bimetallic nickel and palladium complexes for catalytic applications

2016 ◽  
Vol 70 (8) ◽  
Author(s):  
Shane C Van Wyk ◽  
Martin O. Onani ◽  
Ebbe Nordlander
Keyword(s):  
South Africa ◽  
Homogeneous Catalysis ◽  
Organometallic Compounds ◽  
Extended Period ◽  
Palladium Complexes ◽  
Rich Country ◽  
Pharmaceutical Industries ◽  
Catalytic Applications ◽  
Nickel And Palladium Complexes

AbstractSouth Africa is a mineral-rich country and one area in which minerals can be very important is catalysis. Over an extended period of time, homogeneous catalysis has grown to become very useful, particularly in the chemical and pharmaceutical industries. The organometallic compounds required in the catalysis industry have advanced from metallocenes to an alternative in the form of

scholarly journals New palladium–oxazoline complexes: Synthesis and evaluation of the optical properties and the catalytic power during the oxidation of textile dyes

2015 ◽  
Vol 11 ◽  
pp. 1175-1186 ◽  
Author(s):  
Rym Hassani ◽  
Mahjoub Jabli ◽  
Yakdhane Kacem ◽  
Jérôme Marrot ◽  
Damien Prim ◽  
...  
Keyword(s):  
Optical Properties ◽  
Spectroscopic Analysis ◽  
Palladium Complexes ◽  
X Ray Diffraction ◽  
Factors Affecting ◽  
Enantiomerically Pure ◽  
One Step ◽  
Uv Visible ◽  
High Yields

The present paper describes the synthesis of new palladium–oxazoline complexes in one step with good to high yields (68–95%). The oxazolines were prepared from enantiomerically pure α-aminoalcohols. The structures of the synthesized palladium complexes were confirmed by NMR, FTIR, TOFMS, UV–visible spectroscopic analysis and X–ray diffraction. The optical properties of the complexes were evaluated by the determination of the gap energy values (E g) ranging between 2.34 and 3.21 eV. Their catalytic activities were tested for the degradation of Eriochrome Blue Black B (a model of azo dyes) in the presence of an ecological oxidant (H2O2). The efficiency of the decolorization has been confirmed via UV–visible spectroscopic analysis and the factors affecting the degradation phenomenon have been studied. The removal of the Eriochrome reached high yields. We have found that the complex 9 promoted 84% of color elimination within 5 min (C 0 = 30 mg/L, T = 22 °C, pH 7, H2O2 = 0.5 mL) and the energetic parameters have been also determined.

Enantiomerically pure nucleophiles in diastereoselective palladium catalysed allylic substitution reactions

Chirality ◽  
2003 ◽  
Vol 15 (2) ◽  
pp. 190-195 ◽  
Author(s):  
Mark E. Humphries ◽  
Barry P. Clark ◽  
Samantha Regini ◽  
Lara Acemoglu ◽  
Jonathan M.J. Williams
Keyword(s):  
Allylic Substitution ◽  
Substitution Reactions ◽  
Enantiomerically Pure

Synthesis, characterization and determination of absolute structures of palladium complexes of novel chiral acyclic tellurated Schiff base ligands

2018 ◽  
Vol 42 (8) ◽  
pp. 6264-6273 ◽  
Author(s):  
H. R. Rajegowda ◽  
P. Raghavendra Kumar ◽  
Amar Hosamani ◽  
R. J. Butcher
Keyword(s):  
Schiff Base ◽  
Palladium Complexes ◽  
Schiff Base Ligands ◽  
Enantiomerically Pure ◽  
Organotellurium Ligands

Enantiomerically pure chiral hybrid organotellurium ligands and their asymmetric palladium complexes have been synthesized and characterized.

Photoelectric properties for aromatic triangular tri-palladium complexes and their catalytic applications in Suzuki-Miyaura coupling reaction

2021 ◽  
Author(s):  
Xujun Li ◽  
Jia Li ◽  
Xiaoshuang Wang ◽  
lingang Wu ◽  
Yanlan Wang ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Palladium Complexes ◽  
Cyclic Voltammogram ◽  
Catalytic Activities ◽  
Photoelectric Properties ◽  
Catalytic Applications

The photoelectric properties and catalytic activities of substituted triphenylphosphine and sulfur/selenium ligands supported aromatic triangular tri-palladium complexes 1-4, abbreviated as [Pd3]+, were investigated. The cyclic voltammogram of [Pd3]+ in CH3CN-nBu4NPF6...

Enantioselektive Katalyse, XVIII Der Einfluß nicht koordinierter Stereozentren auf die enantioselektive Hydrierung/Enantioselective Catalysis, XVIII The Influence of Non-Coordinated Stereocenters on the Enantioselective Hydrogenation

1998 ◽  
Vol 53 (2) ◽  
pp. 211-223 ◽  
Author(s):  
Ulrich Nagel ◽  
Christoph Roller
Keyword(s):  
Michael Addition ◽  
Enantioselective Hydrogenation ◽  
Palladium Complexes ◽  
Enantioselective Catalysis ◽  
Pyrrolidine Ring ◽  
Enantiomerically Pure ◽  
Stereogenic Centers ◽  
Methyl Phenyl ◽  
Phenyl Vinyl

Abstract 3,4-Bis{[2-(methyl-phenyl-oxophosphanyl)-ethyl]phenyl-phosphanyl}pyrrolidines have be­en synthesized by Michael Addition from the corresponding methyl-phenyl-vinyl-phosphane oxides and 3,4-bis(phenylphosphino)pyrrolidines. For purification of the ligands palladium complexes were used and with the enantiomerically pure ligands Rh complexes have been pre­pared. The catalyst has 6 stereogenic centers. In the hydrogenation of Z-α-acetamidocinnamic acid all six stereogenic centers have an influence on the enantioselectivity. The influence is strongest from the C stereocenters of the pyrrolidine ring. Less important are the stereogenic centers on the coordinated P atoms. The influence of the stereocenters on the non-coordinated P = O groups is the least, but it is not negligible. The ee values obtained with the ligands containing P = O groups are much lower than those obtained with ligands which are substituted only with aryl groups. Ketones are hydrogenated with only low ee’s.

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