13 research outputs found

    Cyclopentadienone Iron Tricarbonyl Complexes-Catalyzed Hydrogen Transfer in Water

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    International audienceThe development of efficient and low-cost catalytic systems is important for the replacementof robust noble metal complexes. The synthesis and application of a stable, phosphine-free,water-soluble cyclopentadienone iron tricarbonyl complex in the reduction of polarized doublebonds in pure water is reported. In the presence of cationic bifunctional iron complexes, a variety ofalcohols and amines were prepared in good yields under mild reaction conditions

    A MOF-assisted phosphine free bifunctional iron complex for the hydrogenation of carbon dioxide, sodium bicarbonate and carbonate to formate

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    International audienceThe hydrogenation of carbon dioxide into formic acid (FA) with Earth-abundant metals is a vibrant research area because FA is an attractive molecule for hydrogen storage. We report a cyclopentadienyl iron tricarbonyl complex that provides up to 3000 turnover number for carbon dioxide hydrogenation when combined with a catalytic amount of the chromium dicarboxylate MOF MIL-53(Cr). To date, this is the highest turnover number reported in the presence of a phosphine-free iron complex

    Amine Directed Palladium Catalyzed C‐H Halogenation of Phenylalanine Derivatives

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    International audienceAn efficient primary amine-directed palladium catalyzed C-H halogenation (X = I, Br, Cl) of phenylalanine derivatives is reported on a range of quaternary amino acid (AA) derivatives thanks to suited conditions employing trifluoroacetic acid as additive. The extension of this original native functionality-directed ortho-selective halogenation was even demonstrated with the more challenging native phenylalanine as tertiary AA

    ÎČ-Strand Mimicry: Exploring Oligothienylpyridine Foldamers

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    International audienceProtein–protein interactions (PPIs) are involved in many cellular processes; consequently, the discovery of small molecules as modulators of PPIs has become an important challenge in medicinal chemistry. Structural mimetics of α‐helices, ÎČ‐turns or ÎČ‐strands could maintain or restore biological functions and should possess biological activity. At this time, the most challenging classes of PPIs are those mediated by ÎČ‐sheet interactions, which are implicated in a number of diseases. Only a few ÎČ‐strand mimics have been published to date. This study presents an evaluation of oligothienylpyridyl scaffolds in view of their ability for ÎČ‐strand mimicry. In this study, theoretical ring twist angle predictions for these scaffolds have been validated by X‐ray diffraction and molecular dynamics simulations with NMR constraints. Careful choice of substituent and heavy‐atom positions in the foldamer units opens the way to produce reasonably coplanar compounds mimicking ÎČ‐strand side‐chain distributio
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