Recent advances in the synthesis and coordination chemistry of aminophosphine phosphinite ligands (AMPP) and closely related auxiliaries are reviewed. Asymmetric catalytic reactions involving various ...organometallic AMPP complexes are presented.
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The preparation and characterization of cationic iridium complexes bearing chiral aminophosphine-oxazoline auxiliaries of general formula Ir(COD)L*X X: PF
6 and B(Ar
F)
4 is reported. These ...complexes have been applied to the asymmetric hydrogenation of two imines:
N-(phenylethylidene)aniline
S1 and
N-(phenylethylidene)benzylamine
S2 providing the corresponding chiral amines in up to 90% and 82% ee, respectively.
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A series of chiral aminophosphine–oxazoline auxiliaries has been prepared and applied in the copper-catalysed 1,4-addition of diethylzinc to enones. The addition products are obtained ...quantitatively in up to 67% ee. The most efficient ligand of the series is based on
l-indoline carboxylic acid and
l-valinol.
Cette thèse présente l'état de la recherche de particules supersymétriques dans le cadre spécifique du modèle mSUGRA au LHC avec le détecteur Atlas. Elle est basée sur les données prises entre 2010 ...et 2011 et présente aussi certains aspects du travail réalisé en amont par la collaboration pour obtenir ces résultats.
Chiral aminophosphine–oxazoline ligands derived from two different amino acids (tetrahydroisoquinoline carboxylic acid and proline) have been synthesized and examined as chiral auxiliaries in ...asymmetric allylic alkylation of three substrates. Stereoisomers
1a
and
2a
are providing the highest enantioselectivities (up to 94% ee) in the allylation of diphenylpropenyl acetate.
The synthesis of four chiral auxiliaries is described sarting from a combination of amino acids and amino alcohols.
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Palladium catalyzed asymmetric allylic alkylation of prochiral aryl cyano esters has been carried out in the presence of various chiral ligands. The base and additives have been ...varied and allowed to produce the allyl derivative presenting a highly functionalized quaternary stereogenic center. The chiral pocket ligands of Trost appears the most appropriate to produce the desired chiral derivative.
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The asymmetric allylic alkylation of prochiral aryl cyano esters has been carried out in the presence of a bi-component catalytic system containing a palladium and a rhodium complex ...modified by phosphorus containing chiral auxiliaries. The allyl derivatives were isolated in up to 63% ee. The chiral pocket ligands of Trost appear the most appropriate to produce the desired chiral derivatives.
The dynamics of isolated-photon plus jet production in pp collisions at a centre-of-mass energy of 7 TeV has been studied with the ATLAS detector at the LHC using an integrated luminosity of 37 pb-1. ...Measurements of isolated-photon plus jet bin-averaged cross sections are presented as functions of photon transverse energy, jet transverse momentum and jet rapidity. In addition, the bin-averaged cross sections as functions of the difference between the azimuthal angles of the photon and the jet, the photon--jet invariant mass and the scattering angle in the photon--jet centre-of-mass frame have been measured. Next-to-leading-order QCD calculations are compared to the measurements and provide a good description of the data, except for the case of the azimuthal opening angle.
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