Journal
POLYHEDRON
Volume 129, Issue -, Pages 182-188Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2017.03.020
Keywords
Arylhydrazones of beta-diketones; Cd-JI complexes; Oxidation of cyclohexanol; Oxidation of 1-phenylethanol; Catalysis
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Funding
- Fundacao para a Ciencia e a Tecnologia (FCT, Portugal), Portugal [SFRH/BPD/90883/2012]
- Ministry of Education and Science of the Russian Federation [02.a03.21.0008]
- [PTDC/QEQ-QIN/3967/2014]
- [UID/QUI/00100/2013]
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Reaction of cadmium acetate hydrate with sodium 2-[2-(4,4-dimethyl-2,6-dioxocyclohexylidene)hydrazinyl]terephthalate (Na2HL), in the presence of imidazole (im), leads to the polymeric species [Cd (im)(3)(mu, eta-HL-1 kappa OO ':2 kappa O '' O '''](n) that is characterized by IR spectroscopy, elemental analysis, UV-Vis absorption spectroscopy and X-ray diffraction analysis. Complex I was successfully tested as catalyst for the peroxidative oxidation of alcohols (1-phenylethanol and cyclohexanol) to the corresponding ketones under microwave irradiation, with no added solvent and under mild conditions. The use of tert-butylhydroperoxide as oxidant, of TEMPO as additive, and a temperature of 80 degrees C leads in 1 h to a yield of acetophenone (from 1-phenylethanol) of nearly 70% or to a cyclohexanone yield (from cyclohexanol) of 66%. A comparison between the catalytic activity of 1 with those (also studied in this work) shown by Cu(II) complexes bearing the same or related hydrazo ligand is presented. (C) 2017 Elsevier Ltd. All rights reserved.
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