1: 1.) ozone, 2.) lithium aluminum hydride / 1.) acetonitrile, -15 deg C, 130 min, 2.) THF, 22 deg C, 10 min 2: 2.31 g / pyridine / 1.) 0 deg C, 13 min, 2.) room temperature, 2 h View Scheme

lithium aluminium tetrahydride; ozone 1.) acetonitrile, -15 deg C, 130 min, 2.) THF, 22 deg C, 10 min; Yield given. Multistep reaction;

1: ozone / diethyl ether / 2 h / -78 °C 2: LiAlH4 / diethyl ether / 2 h / Ambient temperature 3: 89 percent / triphenylphosphine / CCl4 / 22 h / Heating View Scheme