Abstract:

      We review recent global benzil preparation methods by benzoin oxidation reaction. We also address many benzoin oxidation reaction methods. Two kinds of synthesis method exist. One is direct oxidation method, which employs such oxidant as inorganic compound, organic compound, metal organic compound and polymeric compound. The other one is indirect oxidation method, which uses catalyst or microwave radiation for catalysis. Especially, the method of catalyzing molecular oxygen deserves more attention, which provides an effective and green new path for the preparation of benzil compounds by benzoin oxidation.

Key words: benzoin, benzil, oxidation