Luminescent Ruthenium(II) Polypyridyl Functionalized Gold Nanoparticles; Their DNA Binding Abilities and Application As Cellular Imaging Agents

The synthesis and photophysical and biological investigation of Ru(II)-polypyridyl stabilized watersoluble, luminescent gold nanoparticles (AuNPs) are described. These structures bind to DNA and undergo rapid cellular uptake, being localized within the cell cytoplasm and nucleus within 4 h

Jean Frappier. — Etude sur « Yvain, ou le chevalier au lion » de Chrétien de Troyes

Labande Edmond René, Sansone Giuseppe E. Jean Frappier. — Etude sur « Yvain, ou le chevalier au lion » de Chrétien de Troyes. In: Cahiers de civilisation médiévale, 15e année (n°59), Juillet-septembre 1972. pp. 239-241

Jean Frappier. — Etude sur « Yvain, ou le chevalier au lion » de Chrétien de Troyes

Labande Edmond René, Sansone Giuseppe E. Jean Frappier. — Etude sur « Yvain, ou le chevalier au lion » de Chrétien de Troyes. In: Cahiers de civilisation médiévale, 15e année (n°59), Juillet-septembre 1972. pp. 239-241

Synthesis of axially chiral biaryl compounds by asymmetric catalytic reactions with transition metals

International audienceAxially chiral biaryl structures are unique systems encountered in various synthetic compounds such as BINAP and BINOL, polymers, but also in natural products presenting a pharmaceutical interest such as Vancomycin, Steganacin or Korupensamine. The axial chirality of these products, so-called atropisomerism, is induced by the restricted rotation around the aryl–aryl bond. This review will summarize the different strategies imagined by chemists to control such chirality, focusing on asymmetric catalytic processes with transition metals. Only transition metal complexes bearing chiral ligands will be considered and the core of this review will consist of the enantioselective coupling of two achiral substrates

Bifunctional N-heterocyclic carbene ferrocenyl ligands - synthesis and palladium(II) complexes

International audienceTwo ferrocenylimidazolium tetrafluoroborate salts [R = Me, 7 and R = (2,4,6-trimethylphenyl), 8], precursors of new ferrocenylimidazol-2-ylidene bifunctional ligands, have been prepared for the first time. The free 1-(2-dimethylaminomethyl)ferrocenyl-3-methylimidazol-2-ylidene (12) was isolated and characterised by H-1 and C-13 NMR spectroscopy and represents the second example of an isolated and characterised imidazol-2-ylidene directly linked to ferrocene. Neutral (compound 13) and cationic (compound 14) palladium(II) complexes were obtained in moderate yields and characterised by H-1 and C-13 NMR spectroscopy and mass spectrometry

Palladium(ii) complexes with planar chiral ferrocenyl phosphane-(benz)imidazol-2-ylidene ligands

International audienceWe describe here the first examples of planar chiral ferrocenyl phosphane-benzimidazol-2-ylidene ligands and their coordination chemistry with palladium(ii). All ligand precursors, namely enantiopure ferrocenyl phosphane-(benz)imidazolium salts, and all enantiopure palladium complexes have been fully characterised by 1H, 31P and 13C NMR, mass spectrometry and X-ray diffraction methods for seven examples. The potential of these very bulky bidentate ligands in catalysis was evaluated and compared to their imidazol-2-ylidene analogues. The influence of sterics was shown to be non-negligible as the bulkiest ligand gave the lowest activities in the asymmetric Suzuki-Miyaura reaction

Palladium(ii) complexes with planar chiral ferrocenyl phosphane-(benz) imidazol-2-ylidene ligands

We describe here the first examples of planar chiral ferrocenyl phosphane-benzimidazol-2-ylidene ligands and their coordination chemistry with palladium(ii). All ligand precursors, namely enantiopure ferrocenyl phosphane-(benz)imidazolium salts, and all enantiopure palladium complexes have been fully characterised by 1H, 31P and 13C NMR, mass spectrometry and X-ray diffraction methods for seven examples. The potential of these very bulky bidentate ligands in catalysis was evaluated and compared to their imidazol-2-ylidene analogues. The influence of sterics was shown to be non-negligible as the bulkiest ligand gave the lowest activities in the asymmetric Suzuki-Miyaura reaction. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2014

A Newcomer in Defamatory Propaganda : Youth (Late Fourteenth to Early Fifteenth Century)

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