Abstract
Influence of Reaction Conditions on the Catalytic Oxidation of Cyclohexene with Molecular Oxygen Using a Series of Keggin-Type Polyoxometalate
Highlights
Allylic oxidation of olefins is a very attractive processes for the obtenation of α,βunsaturated alcohols and ketones which are important transformation due to the presence of a highly reactive carbonyl group.In particular the oxidation products of cyclohexene (CyH) has an important position among the oxidation of olefinic compounds
Cyclohexene is a raw material to produce fine chemicals since its allylic products i.e. 2-cyclohexen-1-ol, 2-cyclohexen-1-one have a great importance in industrial processes and find several applications as intermediates for the manufacture of useful chemicals1-5. 2-cyclohexen1-ol is important in natural product synthesis and it can converted to phenol without co-products. 2-cyclohexen-1-one has its main industrial application in the synthesis of medication, pesticides, insect pheromone and adipic acid which used in the production of nylon-6
The oxidation and acid functions of POMS are of great importance in catalysis, because the redox and acidic properties can be controlled at atomic or molecular levels[8,9,10]
Summary
Allylic oxidation of olefins is a very attractive processes for the obtenation of α,βunsaturated alcohols and ketones which are important transformation due to the presence of a highly reactive carbonyl group.In particular the oxidation products of cyclohexene (CyH) has an important position among the oxidation of olefinic compounds. The X-ray diffractograms of HPW, HPMo, CoPW and FePW are illustrated in Fig. 2.The results showed the presence of diffraction peaks at 2θ ranging in (7o–10o), (16o–23o), (25o–30o), and (31o– 38o).
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