Anodic oxidation of p-methylanisole (1a) in a solution of aqueous 0.05 M H2SO4/acetone cosolvent (1 : 1, v/v) on platinum gives 5,4’-dimethyl-2-methoxydiphenylether (3), a compound hitherto unexplored, in 50% yield at a temperature below 15-degrees-C. Polymer products are formed in significant amounts (up to 60%) besides the diphenylether derivative (3) when the electrolytic oxidation proceeds in a solution containing AcOH as cosolvent at room temperature. The reaction mechanism includes both side chain anodic oxidation and ring 6e oxidation leading to a reactive intermediate, probably 3-methyl-5-methoxy-1,2-benzoquinone (5), whose polymeric products were also isolated.