1 research outputs found
Expanding the family of octahedral chiralâatâmetal cobalt(Iii) catalysts by introducing tertiary amine moiety into the ligand
Chiral metalâtemplated complexes are attractive catalysts for organic synthetic transformations. Herein, we introduce a novel chiral cobalt(III)âtemplated complex based on chiral transâ3,4âdiaminoâ1âbenzylpyrrolidine and 3,5âdiâtertâbutylâsalicylaldehyde which features both hydrogen bond donor and BrĂžnsted base functionalities. The obtained complexes were fully characterized by1H,13C NMR, IRâ, UVâvis, CDâspectroscopy and by a single Xâray diffraction analysis. It was shown that chlorine anion is connected with amino groups of the complex via a hydrogen bonding. DFT calculations of charges and molecular electrostatic potential of the cobalt(III) complex showed that the basicity of the complex is certainly diminished as compared with the routine tertiary amines but the acidity of the conjugated acid of the complex should be increased. Thus, the catalytic potential of the complex may be much greater as a chiral acid than a chiral base. We believe that this work opens a new way in chiral bifunctional catalyst design. © 2021 by the authors. Licensee MDPI, Basel, Switzerland