Ruthenium (II) complexes with C2- and C1-symmetric bis-(+)-camphopyrazole ligands and their evaluation in catalytic transfer hydrogenation of aldehydes

Blanco CO, Llovera L, Herrera AC, Dorta R, Agrifoglio G, Venuti D, Landaeta VR, Pastrán J (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Inorganica Chimica Acta Elsevier

Book Volume: 524

Article Number: 120429

DOI: 10.1016/j.ica.2021.120429

Abstract

Ruthenium (II) piano-stool complexes with bis-(+)-camphopyrazole ligands of C2 and C1 symmetry were prepared in good yields (66–98%). New C2-C1 ligands and complexes were characterized by multinuclear NMR spectroscopy, FT-IR and elemental analysis. The catalytic performance of the Ru(II)-bis-(+)-camphopyrazole complexes in the transfer hydrogenation of benzaldehyde and valeraldehyde using isopropanol/potassium carbonate and formic acid/triethylamine mixtures as hydrogen donors, was evaluated, resulting in moderate yields (>54%) for the reduction to the desired primary alcohols. The system with isopropanol as hydrogen source proved to be more selective than the analogous system using the azeotropic formic acid/triethylamine mixture, allowing benzyl alcohol to be obtained in quantitative yield (>99%) for a particular catalyst precursor. Furthermore, complexes with C2 symmetry ligands showed higher yields than those with C1 symmetry ligands in all of the evaluated systems.

Authors with CRIS profile

Alberto Cesar Herrera Lehrstuhl für Anorganische und Allgemeine Chemie Romano Dorta Professur für Anorganische Chemie

Involved external institutions

Universidad Simón Bolívar VE Venezuela, Bolivarian Republic of (VE) Central University of Venezuela (UCV) / Universidad Central de Venezuela VE Venezuela, Bolivarian Republic of (VE) Venezuelan Institute for Scientific Research / Instituto Venezolano de Investigaciones Científicas (IVIC) VE Venezuela, Bolivarian Republic of (VE)

How to cite

APA:

Blanco, C.O., Llovera, L., Herrera, A.C., Dorta, R., Agrifoglio, G., Venuti, D.,... Pastrán, J. (2021). Ruthenium (II) complexes with C2- and C1-symmetric bis-(+)-camphopyrazole ligands and their evaluation in catalytic transfer hydrogenation of aldehydes. Inorganica Chimica Acta, 524. https://dx.doi.org/10.1016/j.ica.2021.120429

MLA:

Blanco, Christian O., et al. "Ruthenium (II) complexes with C2- and C1-symmetric bis-(+)-camphopyrazole ligands and their evaluation in catalytic transfer hydrogenation of aldehydes." Inorganica Chimica Acta 524 (2021).

BibTeX: Download