Oxidation of Benzoins to Benzils with Chromium Trioxide Under Viscous Conditions

Abstract

An efficient and selective oxidation of benzoins into corresponding benzils using chromium trioxide under viscous conditions at room temperature is described. The present oxidations are completed within 2 h with the yield of 86–96%. It can overcome the problems of the common solvent-free reactions, in which it is difficult for the solid molecular collision to react.

Keywords:

• Benzils
• benzoins
• chromium trioxide
• oxidation
• viscous conditions

Notes

^a All the products are known compounds and were identified by comparison of their melting points with the literature values as well as by ¹H NMR and IR.

^b Yields of isolated pure products.