Oxidation of Hydrobenzoins to Benzils by Ammonium Chlorochromate/Montmorillonite K-10 Under Ultrasound Irradiation

Abstract

The oxidation of hydrobenzoins to the corresponding benzils was carried out in excellent yield by ammonium chlorochromate (ACC) supported on montmorillonite K10 in CH₂Cl₂ at room temperature under ultrasound irradiation.

Keywords:

• Benzil
• hydrobenzoin
• oxidation
• supported reagent
• ultrasound irradiation

ACKNOWLEDGMENT

The project was supported by the Natural Science Foundation of Hebei Province (B2006000969), China.

Notes

^a Reaction temperature: 22–27°C; the substrate was 1 mmol; about 0.555 g ACC/montmorillonite K10 including 1 mmol ACC.

^b The reaction was stirred without ultrasound.

^a Reaction temperature: 22–27°C.

^b Benzoin was 1 mmol; the oxidant ACC/montmorillonite K10 was 1.11 g (including 2 mmol ACC).