By Tai YOKOYAMA and Noriaki IZUI (Received January 22, 1965) In the preceding paper, 1) the peracid oxidations of 4-phenyl-3-buten-2-one and its 3-substituted derivatives, and of 1, 3-diphenyl-2-propen-1-one and its 2-methyl derivative, were carried out. It was found that the unsaturated group migrated exclusively as compared to the methyl group, that the migratory aptitude of the 2-phenylethenyl group was about three times that of the phenyl ...