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Max Planck Institute for Human Cognitive and Brain Sciences
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Papers by Veronique Dufaud
Industrial & Engineering Chemistry Research
Angewandte Chemie (International ed. in English), Jan 22, 2018
A frustrated Lewis pair (FLP) system was obtained by confinement of the Lewis base partner, a Ver... more A frustrated Lewis pair (FLP) system was obtained by confinement of the Lewis base partner, a Verkade's superbase, in a molecular cavity. Whereas the model superbase lacking cavity displayed no catalytic activity in Morita-Baylis-Hillman (MBH) reactions, when associated to titanium (IV) chloride, the encaged superbase turns out to be an efficient catalyst under the same conditions. The crucial role of the endohedral functionalized cage on catalytic performance was further demonstrated by the fact that model superbases with bulky substituents were much less efficient to produce active catalysts, as well as by inhibition and substrate selection experiments. P NMR spectroscopy and mass spectrometry experiments evidenced that no interaction between the Lewis acidic and basic partners occurred when the superbase was capped by a cycloveratrylene (CTV) unit, thus creating a true FLP active system.
Angewandte Chemie International Edition in English, Dec 1, 1996
... Chem., 1996, 6 / , 8000-8001. [7] D. Meng. E. J Sorensen. P. Bertinato, S. J. Danishefsky, J ... more ... Chem., 1996, 6 / , 8000-8001. [7] D. Meng. E. J Sorensen. P. Bertinato, S. J. Danishefsky, J Org. Cliem., 1996, 61. ... Engl. 1996, 35, No. 23/24 0 VCH Verlagsgesellsrhuft mbH, 0-69451 Weinheim, 1996 0570-0833i9~:3523-2X03 $ 15.OO+ 2.5 0 2803 Page 2. COMMUNICATIONS ...
Advanced Synthesis Catalysis, 2009
Various silica-supported acetylacetonate and alkoxy zirconium(IV) complexes have been prepared an... more Various silica-supported acetylacetonate and alkoxy zirconium(IV) complexes have been prepared and characterized by quantitative chemical measurements of the surface reaction products, quantitative surface microanalysis of the surface complexes, in situ infrared spectroscopy, CP-MAS
J Am Chem Soc, 1995
ABSTRACT
Journal of Molecular Catalysis, 1993
The effect of the coordination of a tricarbonylchromium moiety to the aromatic ring of aryl chlor... more The effect of the coordination of a tricarbonylchromium moiety to the aromatic ring of aryl chlorides in the activation toward oxidative addition of the C-Cl bond to zerovalent palladium complexes is described. It presents an overview of catalytic reactions and fundamental investigations with the aim to rationalizing the role of the Cr (CO), moiety on some of the elementary steps of these reactions. This topic is divided according to the nature of the catalytic reactions involving the tricarbonyl(chloroarene)chromium complexes. Firstly, the results obtained during the cross-coupling reaction with nucleophilic reagents (copper acetylides, organostannanes) and the catalytic Heck olefination reaction are presented. Then, several carbonylation processes, such as hydrocarbonylation into aldehydes, mono-and double carbonylation into amides and cy-oxo-amides, and finally alkoxycarbonylation into esters, are discussed. Particular attention is given to the catalytic and stoichiometric aspects of this last reaction.
Applied Catalysis a General, Nov 1, 2009
ABSTRACT
Zeitschrift fur Naturforschung B
Industrial & Engineering Chemistry Research
Angewandte Chemie (International ed. in English), Jan 22, 2018
A frustrated Lewis pair (FLP) system was obtained by confinement of the Lewis base partner, a Ver... more A frustrated Lewis pair (FLP) system was obtained by confinement of the Lewis base partner, a Verkade's superbase, in a molecular cavity. Whereas the model superbase lacking cavity displayed no catalytic activity in Morita-Baylis-Hillman (MBH) reactions, when associated to titanium (IV) chloride, the encaged superbase turns out to be an efficient catalyst under the same conditions. The crucial role of the endohedral functionalized cage on catalytic performance was further demonstrated by the fact that model superbases with bulky substituents were much less efficient to produce active catalysts, as well as by inhibition and substrate selection experiments. P NMR spectroscopy and mass spectrometry experiments evidenced that no interaction between the Lewis acidic and basic partners occurred when the superbase was capped by a cycloveratrylene (CTV) unit, thus creating a true FLP active system.
Angewandte Chemie International Edition in English, Dec 1, 1996
... Chem., 1996, 6 / , 8000-8001. [7] D. Meng. E. J Sorensen. P. Bertinato, S. J. Danishefsky, J ... more ... Chem., 1996, 6 / , 8000-8001. [7] D. Meng. E. J Sorensen. P. Bertinato, S. J. Danishefsky, J Org. Cliem., 1996, 61. ... Engl. 1996, 35, No. 23/24 0 VCH Verlagsgesellsrhuft mbH, 0-69451 Weinheim, 1996 0570-0833i9~:3523-2X03 $ 15.OO+ 2.5 0 2803 Page 2. COMMUNICATIONS ...
Advanced Synthesis Catalysis, 2009
Various silica-supported acetylacetonate and alkoxy zirconium(IV) complexes have been prepared an... more Various silica-supported acetylacetonate and alkoxy zirconium(IV) complexes have been prepared and characterized by quantitative chemical measurements of the surface reaction products, quantitative surface microanalysis of the surface complexes, in situ infrared spectroscopy, CP-MAS
J Am Chem Soc, 1995
ABSTRACT
Journal of Molecular Catalysis, 1993
The effect of the coordination of a tricarbonylchromium moiety to the aromatic ring of aryl chlor... more The effect of the coordination of a tricarbonylchromium moiety to the aromatic ring of aryl chlorides in the activation toward oxidative addition of the C-Cl bond to zerovalent palladium complexes is described. It presents an overview of catalytic reactions and fundamental investigations with the aim to rationalizing the role of the Cr (CO), moiety on some of the elementary steps of these reactions. This topic is divided according to the nature of the catalytic reactions involving the tricarbonyl(chloroarene)chromium complexes. Firstly, the results obtained during the cross-coupling reaction with nucleophilic reagents (copper acetylides, organostannanes) and the catalytic Heck olefination reaction are presented. Then, several carbonylation processes, such as hydrocarbonylation into aldehydes, mono-and double carbonylation into amides and cy-oxo-amides, and finally alkoxycarbonylation into esters, are discussed. Particular attention is given to the catalytic and stoichiometric aspects of this last reaction.
Applied Catalysis a General, Nov 1, 2009
ABSTRACT
Zeitschrift fur Naturforschung B