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.
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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.