1: tetrahydrofuran / 6 h / Ambient temperature 2: 1) BuLi / 1) hexane, THF, 2) THF, -78 deg C 3: 1) LiAlH4, 2) 10percent aq. NaOH / 1) -20 deg C, 2 h, THF, hexane, 2) -10 deg C, 1 h, THF, hexane View Scheme

lithium aluminium tetrahydride; n-butyllithium; boron trifluoride diethyl etherate 1.) THF, hexane, -78 degC; 2.) THF, -10 degC, 2 h.; Yield given. Multistep reaction;

1: 1) BuLi / 1) hexane, THF, 2) THF, -78 deg C 2: 1) LiAlH4, 2) 10percent aq. NaOH / 1) -20 deg C, 2 h, THF, hexane, 2) -10 deg C, 1 h, THF, hexane View Scheme