1: 88 percent / BaMnO4 / CH2Cl2 / 1) RT, 12h, 2) 6h, reflux 2: 86 percent / m-chloroperbenzoic acid / CH2Cl2 / 0.17 h / -15 °C 3: 58 percent / Rh2(OAc)4 / benzene / 0.03 h / Heating 4: 31 percent / ethanol / 1.25 h / Irradiation View Scheme