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- Title
Valmet Chiral Schiff‐Base Ligands And Their Copper(II) Complexes as Organo, Homogeneous and Heterogeneous Catalysts for Henry, Cyanosilylation and Aldol Coupling Reactions.
- Authors
Arora, Zinnia; Eftemie, Diana‐Ioana; Spinciu, Adela; Maxim, Cătălin; Hanganu, Ana‐Maria; Tudorache, Madalina; Cojocaru, Bogdan; Pavel, Octavian D.; Granger, Pascal; Andruh, Marius; Pârvulescu, Vasile I.
- Abstract
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.
- Subjects
HETEROGENEOUS catalysts; NITROALDOL reactions; LIGANDS (Chemistry); COPPER; SODIUM ions; COPPER compounds; ALDOLS
- Publication
ChemCatChem, 2021, Vol 13, Issue 21, p4634
- ISSN
1867-3880
- Publication type
Article
- DOI
10.1002/cctc.202101149