C2 and C1-Symmetric Camphopyrazole Dioxomolybdenum(VI) Complexes catalyze the Epoxidation of Cyclic Olefins

Aguilera T, Pastrán J, Llovera L, Linden A, Herrera AC, Venuti D, Agrifoglio G, Dorta R (2023)


Publication Type: Journal article

Publication year: 2023

Journal

DOI: 10.1002/zaac.202300104

Abstract

Dioxomolybdenum(VI) complexes (1-6) were prepared in good yields (≥79 %) using enantiopure C2 and C1-symmetric bidentate N,N-ligands (L1-L6) derived from (+)-camphor. The ligands and complexes were characterized by NMR spectroscopy, IR, and elemental analysis. Single crystal X-ray diffraction analyses of complexes 3, 4 and 6 confirmed the bidentate coordination modes of ligands L3, L4, and L6 and revealed distorted octahedral coordination geometries around the metal center. Complexes 3 and 6 form conformational isomers depending on the orientation of the substituents of the ligand aryl groups. Preliminary evaluation of the complexes as catalysts for the epoxidation of cyclohexene (81–93 % conversion) and cis-cyclooctene (66–94 % conversion) with cumyl hydroperoxide and 35 % w/w aqueous hydrogen peroxide (39–73 %) demonstrated their activity for oxygen atom transfer reactions, opening the way for asymmetric epoxidations.

Authors with CRIS profile

Involved external institutions

How to cite

APA:

Aguilera, T., Pastrán, J., Llovera, L., Linden, A., Herrera, A.C., Venuti, D.,... Dorta, R. (2023). C2 and C1-Symmetric Camphopyrazole Dioxomolybdenum(VI) Complexes catalyze the Epoxidation of Cyclic Olefins. Zeitschrift für Anorganische und Allgemeine Chemie. https://doi.org/10.1002/zaac.202300104

MLA:

Aguilera, Tania, et al. "C2 and C1-Symmetric Camphopyrazole Dioxomolybdenum(VI) Complexes catalyze the Epoxidation of Cyclic Olefins." Zeitschrift für Anorganische und Allgemeine Chemie (2023).

BibTeX: Download