Eric Monflier
university of lille
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Featured researches published by Eric Monflier.
Tetrahedron Letters | 1995
Eric Monflier; Sébastien Tilloy; Georges Fremy; Yves Castanet; André Mortreux
Abstract Solvent free biphasic hydroformylalion of various water-insoluble terminal olefins can be achieved in high yields and sclcctivitics by using a water-soluble rhodium/triphenylphosphine trisulfonate catalyst and per(2,6-di-o-mclhyl)-β-cyclodcxtrin as inverse phase transfer catalyst. The catalytic activities were up to ten times higher than those observed without pcr(2,6-di-o-methyl)-β-cyclodextrin.
Environmental Chemistry Letters | 2012
David Landy; Isabelle Mallard; Anne Ponchel; Eric Monflier; Sophie Fourmentin
Nowadays, the human activity and the modern way of life are responsible for the increase of the environmental pollution. Industrial processes generate a variety of molecules that may pollute air, water, and soils due to negative impacts for ecosystems and humans. The development of innovative remediation technologies has thus emerged as a significant environmental priority. Within this scope, supramolecular chemistry, which is a recent discipline, could provide solutions. In particular, cyclodextrins (CDs) are a family of cyclic oligosaccharides having a low-polarity cavity in which organic compounds of appropriate shape and size can form inclusion complexes. This unique property makes them suitable for application in environmental protection. Here, we review the use of cyclodextrins and cyclodextrin derivatives in remediation technologies. Accordingly, the present review shows the advantages of using CDs in soil, groundwater, wastewater, and atmosphere remediation. Resulting processes are highly versatile, since the complexing ability of CD is applicable to a wide range of pollutants. They may also been referred to green processes, according to the CD innocuity. Moreover, as inclusion phenomena correspond to reversible equilibriums, a major trend in the CD environmental application field is to develop methods, which combine supramolecular chemistry and irreversible processes, as advanced oxidation or biodegradation. Such processes might lead to a complete remediation of pollutants and eventually to the CD recycling.
Chemical Communications | 2006
Audrey Nowicki; Yong Zhang; Bastien Léger; Jean-Paul Rolland; Hervé Bricout; Eric Monflier; Alain Roucoux
Efficient chemoselectivities have been obtained in the hydrogenation of benzene derivatives under biphasic liquid-liquid conditions using Ru(0) nanoparticles stabilized and controlled by the relevant choice of cavity and methylation degree of cyclodextrins.
Journal of Molecular Catalysis A-chemical | 2001
Thomas Mathivet; Catherine Méliet; Yves Castanet; André Mortreux; Laurent Caron; Sébastien Tilloy; Eric Monflier
Abstract The biphasic rhodium catalyzed hydroformylation of water insoluble olefins in the presence of chemically modified β-cyclodextrins has been investigated. The influence of various parameters, such as the nature of the β-cyclodextrin, the concentrations of phosphine or cyclodextrin and the temperature is illustrated using 1-decene as a model substrate. The formation of inclusion complexes between the different components of the system is also discussed on the basis of NMR experiments. The results indicate that the chemically modified cyclodextrins (CyDs) must not be considered only as inverse phase transfer catalysts but also as compounds which, by trapping the water soluble ligand, can modify the equilibria between the different catalytic species.
Chemical Communications | 2009
Claudie Hubert; Audrey Denicourt-Nowicki; Alain Roucoux; David Landy; Bastien Léger; Gregory Crowyn; Eric Monflier
Hydrogenation of arene derivatives can be successfully performed in water by using ruthenium(0) nanoparticles stabilized by 1 : 1 inclusion complexes formed between methylated cyclodextrins and an ammonium salt bearing a long alkyl chain.
Journal of Organometallic Chemistry | 1995
Georges Fremy; Yves Castanet; Ryszard Grzybek; Eric Monflier; André Mortreux; Anna M. Trzeciak; Józef J. Ziółkowski
Abstract Hydroformylation of methylacrylate to α-aldehyde can be achieved in a two-phase system in the presence of two new water-soluble phosphines. High yields and selectivities of α-aldehyde (ca. 80% with a α/β ratio of 1:20) were obtained. Spectroscopic studies have been carried out and some new rhodium complexes formed in situ in catalytic systems have been identified.
Journal of Molecular Catalysis A-chemical | 1996
Eric Monflier; Sébastien Tilloy; Emilie Blouet; Yolande Barbaux; André Mortreux
Oxidation of various olefins into methylketones by a catalytic system constituted of palladium, copper, phosphomolybdovanadic acid and per(2,6-di-O-methyl)-β-cyclodextrin is investigated. The role of each redox catalytic system component is discussed from experiments under argon atmosphere and from vanadium NMR spectroscopic studies. The influence of various parameters, such as the per(2,6-di-O-methyl)-β-cyclodextrin concentration and the nature of the phosphomolybdovanadic acid is also reported. Finally, a catalytic cycle is also proposed.
Journal of Molecular Catalysis A-chemical | 1999
Franck Bertoux; Eric Monflier; Yves Castanet; André Mortreux
Abstract The addition of an alkali metal halide or a protective-colloid agent like polyvinylalcohol to water-soluble hydroxycarbonylation catalyst derived from PdCl 2 and the sulfonated phosphine TPPTS prevents the catalyst decay and allows to maintain high activities. The role of these additives is discussed in relation with the reaction mechanism.
Catalysis Science & Technology | 2014
Frédéric Hapiot; Hervé Bricout; Stéphane Menuel; Sébastien Tilloy; Eric Monflier
During the past twenty years, cyclodextrins (CDs) have proven to be very effective in aqueous biphasic catalysis. They could act as molecular receptors for numerous organic substrates and favour their conversion at the aqueous/organic interface. Recently, new applications have been found for CDs in aqueous catalysis. CDs can now be defined as polyfunctional entities between the substrate-containing phase and the catalyst-containing phase. In this paper, we highlight the latest breakthroughs in the use of CDs in catalysis through several examples from the literature.
Green Chemistry | 2002
Sébastien Tilloy; Hervé Bricout; Eric Monflier
The ruthenium-catalyzed hydrogenation of water-insoluble aldehydes in an aqueous/organic two phase system has been investigated in the presence of cosolvents or cyclodextrins. At low content, i.e. a content that enables to recover quantitatively the catalytic system without loss of metal with a cosolvent, β-cyclodextrin and its dimethylated form appear to be more efficient than cosolvents for performing the reaction. The formation of inclusion complexes between cyclodextrin and various components of the reaction medium (aldehyde, alcohol, hydrocarbon of the organic phase) is discussed on the basis of mass spectrometry, NMR and catalytic experiments.