Allylic Oxidation of Δ5-Steroids with Pyridinium Chlorochromate (PCC) and Pyridinium Dichromate (PDC)

Abstract
Pyridinium chlochromate (PCC), in refluxing benzene, or dimethyl sulfoxide, and pyridinium dichromate (PDC) in pyridine, have been found to be effective reagents for the allylic oxidation of Δ5-steroids to yield the corresponding α, β - unsaturated ketones.