Oxidation of benzylhalides to benzaldehyde under Ultrasound Waves in solvent free by H2O2 (green chemistry tool)

This paper shows that ultrasound has the added advantages of improving the process efficiency, reducing the process time and improving the yield of product. Although aldehydes are known for a long time, the development of alternative and more efficient strategies are of considerable relevance. Benzaldehydes have been synthesized by the reaction of benzyl halides and 4-Chloro methyl pyridinium chloride was bonded on silica gel under ultrasound irradiatin. Grignard reagent as an catalysts is recycled and reused several times. Silica gel as an inorganic support has been used in various chemical reactions. The effects of ultrasounds enhancing provided on the reaction time and yield was compared with thermal conditions. the remarkable advantages of this method are short reaction time and high yield of product.

کلیدواژه ها:

4-Chloro methyl pyridinium chloride ، ultrasound ، silica gel ، benzyl halides