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Valmet Chiral Schiff‐Base Ligands And Their Copper(II) Complexes as Organo, Homogeneous and Heterogeneous Catalysts for Henry, Cyanosilylation and Aldol Coupling Reactions

International audience; Cyanosilylation, aldol coupling and asymmetric Henry reactions were carried out with L- and D-valmet ligands in different configurations: i) coordinated to sodium ions, as organocatalysts, with week base properties, ii) complexes with copper(II), as homogeneous catalysts, and iii) immobilized copper(II) complexes onto graphene oxide (GO) as heterogeneous catalysts. For the reaction of benzaldehyde and nitromethane in water these afforded an asymmetric Henry reaction, with a spectacular increase of the conversion and ee (92.5 and 95.8 %, respectively) after the deposition on GO. Ligand complexed copper was also effective for cyanosilylation and Aldol coupling reaction.
- Romanian Academy Romania
- University of Lille France
- UNIVERSITE PARIS DESCARTES France
- University of Bucharest Romania
- Université Paris Diderot France
Microsoft Academic Graph classification: Catalysis Ligand Chemistry Benzaldehyde chemistry.chemical_compound Polymer chemistry Copper chemistry.chemical_element Schiff base Coupling reaction Nitroaldol reaction Aldol reaction
Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Catalysis, Aldol reaction, Cu-complex, Cyanosilylation, Immobilization, Henry reaction, L- and D-valmet ligands, [CHIM.COOR]Chemical Sciences/Coordination chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.ORGA]Chemical Sciences/Organic chemistry
Inorganic Chemistry, Organic Chemistry, Physical and Theoretical Chemistry, Catalysis, Aldol reaction, Cu-complex, Cyanosilylation, Immobilization, Henry reaction, L- and D-valmet ligands, [CHIM.COOR]Chemical Sciences/Coordination chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.ORGA]Chemical Sciences/Organic chemistry
Microsoft Academic Graph classification: Catalysis Ligand Chemistry Benzaldehyde chemistry.chemical_compound Polymer chemistry Copper chemistry.chemical_element Schiff base Coupling reaction Nitroaldol reaction Aldol reaction
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).1 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).1 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average Powered byBIP!

- Romanian Academy Romania
- University of Lille France
- UNIVERSITE PARIS DESCARTES France
- University of Bucharest Romania
- Université Paris Diderot France
International audience; Cyanosilylation, aldol coupling and asymmetric Henry reactions were carried out with L- and D-valmet ligands in different configurations: i) coordinated to sodium ions, as organocatalysts, with week base properties, ii) complexes with copper(II), as homogeneous catalysts, and iii) immobilized copper(II) complexes onto graphene oxide (GO) as heterogeneous catalysts. For the reaction of benzaldehyde and nitromethane in water these afforded an asymmetric Henry reaction, with a spectacular increase of the conversion and ee (92.5 and 95.8 %, respectively) after the deposition on GO. Ligand complexed copper was also effective for cyanosilylation and Aldol coupling reaction.