1: KBH4 / methanol; H2O 2: aq. HBr / 15 °C 3: (i) Mg, (ii) /BRN= 1900390/ View Scheme

1: 97 percent / lithium aluminum hydride / diethyl ether / Heating 2: 94 percent / hexachloroacetone, triphenylphosphine / 2 h / Ambient temperature View Scheme

1: 76 percent / LiAlH4 / diethyl ether / 2 h 2: 40percent aq. HBr / 10 h / -20 °C View Scheme

1: 94 percent / LiAlH4 / diethyl ether / 0.17 h / 0 °C 2: 90 percent / Me3SiBr, ZnBr2 / CH2Cl2 / 0.17 h / 0 °C 3: 1.) EtMgBr, 2.) Li2CuCl4 / 1.) THF, 40-50 deg C, 2.) THF, HMPA, from -70 deg C to 0 deg C, 1 h View Scheme