Manganese(III) acetate-mediated oxidative coupling of phenylhydrazines with benzene: a novel method for biaryl coupling

The reaction of phenylhydrazines with benzene in the presence of manganese(III) acetate affords biaryls in good yields. The same reaction was carried out with similar oxidants, such as Co-III, Ce-IV and Pb-IV; among these oxidants Mn-III acetate shows higher efficiency and selectivity.