1.1: tris(triphenylphosphine)ruthenium(II) chloride; zirconium tetrachloride; triethylamine / dichloromethane / 0.08 h / -78 - 24 °C / Inert atmosphere 1.2: 17 h / -78 - 45 °C / Inert atmosphere 2.1: lithium hydroxide hydrate; dihydrogen peroxide / tetrahydrofuran; water / 6 h / 0 - 20 °C / Inert atmosphere View Scheme