نتایج جستجو برای: salen complexes

تعداد نتایج: 137585  

Journal: :Angewandte Chemie 2007
Hengquan Yang Lei Zhang Lin Zhong Qihua Yang Can Li

The solid catalyst with high catalytic activity and enantioselectivity in the hydrolytic kinetic resolution (HKR) of epoxides was prepared by confining Co(Salen) in the nanocage of SBA-16 through reducing the pore entrance size using a silylation method. It was found that the activity of the solid catalysts increased with the number of [Co(Salen)] molecules per nanocage increasing, and the soli...

Although metal-based anticancer drugs have been recognized as the most effective agents over the organic compounds, non-selectivity and high toxic effects have limited their applications in a way that only three Pt-analogues have progressed into clinical use. These problems have spurred chemists to develop different strategies based on alternative targets. This work focuses on predicting potenc...

Journal: :Dalton transactions 2005
Alexander V Wiznycia John Desper Christopher J Levy

The synthesis of the polyaromatic aldehyde 1-hydroxybenz[a]anthracene-2-carboxaldehyde is reported via a seven step protocol from 9,10-dihydroanthracene, with an overall yield of 30%. Two equivalents of the aldehyde are condensed with (R)-1,1'-binaphthyl-2,2'-diamine to produce a new binaphthyl-salen ligand, which is subsequently complexed to iron(II) and zinc(II) ions. The ligand and complexes...

Journal: :The Journal of organic chemistry 2006
Alexandre Martinez Catherine Hemmert Christophe Loup Guillaume Barré Bernard Meunier

We describe a general synthetic strategy for the preparation of a series of macrocyclic chiral manganese(III) salen complexes. The developed reaction pathway allows the modulation of the different key groups, namely, the chiral diimine, the bulky substituents in positions 3 and 3', and the linker used in the macrocyclization of the Schiff base. The different complexes presented here illustrate ...

Journal: :Dalton transactions 2016
Mitsukimi Tsunoda Martin Fleischmann J Stuart Jones Nattamai Bhuvanesh Manfred Scheer François P Gabbaï

As part of our ongoing interest in the supramolecular chemistry of fluorinated organomercurials, we have investigated the interaction of bis(pentafluorophenyl)mercury ((C6F5)2Hg), and trimeric (perfluoro-o-phenylene)mercury ([o-C6F4Hg]3), with nickel(II) N,N'-bis(salicylidene)ethylenediamine) (Ni(salen)). While solution studies monitored by UV-VIS spectroscopy suggest that Ni(salen) interacts w...

Journal: :Physical chemistry chemical physics : PCCP 2011
Yong Sun Kexian Chen Lu Jia Haoran Li

In an effort to examine the interaction between dioxygen and iron-macrocyclic complexes, and to understand how this interaction was affected by those different macrocyclic ligands, dioxygen binding with iron-porphyrin, iron-phthalocyanine, iron-dibenzotetraaza[14]annulene, and iron-salen complexes is investigated by means of quantum chemical calculations utilizing Density Functional Theory (DFT...

2015
Henrik von Wachenfeldt Alexey V. Polukeev Nagarajan Loganathan Filip Paulsen Philipp Röse Marion Garreau Ola F. Wendt Daniel Strand

Cyclometallated aryl-pyridine gold(III) complexes are shown to be efficient catalysts for the multicomponent reaction between N-benzyl imines, alkynes, and acyl chlorides to form trisubstituted oxazoles. The reaction typically proceeds in good yields (up to over 80%) and short reaction times (∼15 minutes). The high stability of the investigated cyclometallated catalysts enables a retained effic...

Journal: :Dalton transactions 2015
Henrik von Wachenfeldt Alexey V Polukeev Nagarajan Loganathan Filip Paulsen Philipp Röse Marion Garreau Ola F Wendt Daniel Strand

Cyclometallated aryl-pyridine gold(iii) complexes are shown to be efficient catalysts for the multicomponent reaction between N-benzyl imines, alkynes, and acyl chlorides to form trisubstituted oxazoles. The reaction typically proceeds in good yields (up to over 80%) and short reaction times (∼15 minutes). The high stability of the investigated cyclometallated catalysts enables a retained effic...

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