Preparation of stabilized ionic liquid on the SBA-15 and evaluating its catalytic property in oxidation of alcohols

Selective oxidation of alcohols to carbonyl compounds is a fundamental synthetic transformation from both synthetic and industrial points of views, because corresponding carbonyl compounds are versatile intermediates of valuable compounds, such as pharmaceuticals, agricultural, and fine chemicals[1]. In the view of stringent environmental concerns, green chemistry, and specially atom efficiency, substantial amounts of researcheshave been recently dedicated to develop new and efficient catalytic protocols based on hydrogen peroxide as terminal oxidant[2].In this manner, transition metal-catalyzed oxidation of alcohols using hydrogen peroxide has been extensively investigated owing to the fact that hydrogen peroxide is a cheap and environmentally benign oxidant, which produces water as the only by-product.To achieve high efficiency and selectivity in the oxidation of alcohols, catalytic systems based on tungsten have been particularly received a great deal of attention[3]. This paper describes a simple procedure for the synthesis and application of SBA- 15/Im/WO4as a novel nano catalyst in oxidation of alcohols by 30% H2O2 as green oxidant under neutral aqueous reaction conditions. Furtheremore, in order to testify the recyclability of the catalyst, it is recovered and efficiency reused in 6 succeeding reaction cycles without any significant loss. The use of green solvent, very short reaction time with excellent yields.