1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / chloroform / 2 h / 20 °C / Inert atmosphere 2: osmium(VIII) oxide; 4-methylmorpholine N-oxide / acetone; tert-butyl alcohol / 48 h / 20 °C / Inert atmosphere 3: sodium hypochlorite; 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical; sodium hydrogencarbonate; potassium bromide / dichloromethane; water / 0.07 h / 0 °C 4: dimethyl sulfoxide / Irradiation; Cooling; Inert atmosphere View Scheme