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Oxidovanadium complexes with tridentate aroylhydrazone as catalyst precursors for solvent-free microwave-assisted oxidation of alcohols

Paper ID Volume ID Publish Year Pages File Format Full-Text
39374 45821 2015 8 PDF Available
Title
Oxidovanadium complexes with tridentate aroylhydrazone as catalyst precursors for solvent-free microwave-assisted oxidation of alcohols
Abstract

•Oxidovanadium complexes with tridentate aroylhydrazone are synthesized.•X-ray crystal structures are reported.•Complexes are catalysts for solvent-free microwave-assisted oxidation of alcohols.•High yields of ketones are achieved.

Aroylhydrazone oxidovanadium compounds, viz. the oxidoethoxidovanadium(V) [VO(OEt)L] (1) (H2L = salicylaldehyde-2-hydroxybenzoylhydrazone), the salt like dioxidovanadium(V) (NH3CH2CH2OH)+[VO2L]− (2), the mixed-ligand oxidovanadium(V) [VO(hq)L] (Hhq = 8-hydroxyquinoline) (3) and the vanadium(IV) [VO(phen)L] (phen = 1,10-phenanthroline) (4) complexes (3 and 4 obtained by the first time), have been tested as catalysts for solvent-free microwave-assisted oxidation of aromatic and alicyclic secondary alcohols with tert-butylhydroperoxide. A facile, efficient and selective solvent-free synthesis of ketones was achieved with yields up to 99% (TON = 497, TOF = 993 h−1 for 3) and 58% (TON = 291, TOF = 581 h−1 for 2) for acetophenone and cyclohexanone, respectively, after 30 min under low power (25 W) microwave irradiation.

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Keywords
Oxidovanadium complexes; Aroylhydrazone; X-ray structure; Microwave-assisted oxidation
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Oxidovanadium complexes with tridentate aroylhydrazone as catalyst precursors for solvent-free microwave-assisted oxidation of alcohols
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 493, 5 March 2015, Pages 50–57
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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