New Reagent, Manganese Dioxide Supported on Kieselguhr, for Effective Oxidation of Benzoins

Abstract

A new reagent, manganese dioxide supported on kieselguhr, for effective oxidation of benzoins into corresponding benzils under heterogeneous and reflux conditions is described. The present oxidations are completed within 10 h with yields of 86–95%. The main advantages of the present procedure are that the preparation of supported reagent is more convenient and the reaction times are relatively short.

Keywords:

• Benzils
• benzoins
• kieselguhr
• manganese dioxide
• oxidation

Notes

^a All the products are known compounds and were identified by comparison of their spectra with the literature values.

^b Yield of isolated product.