bis(cyclopentadienyl)titanium dichloride; manganese; Coll*HCl; cyclohexa-1,4-diene in tetrahydrofuran 12 h; Ambient temperature;

methanol; sodium tetrahydroborate 1 h; Ambient temperature;

1: 1.) n-BuLi / 1.) diethyl ether, hexane, -20 deg C, 20 min, 2.) diethyl ether, hexane, a) -20 deg C, 2 h, b) RT, 3 h 2: 0.1 M aq. H2SO4 / tetrahydrofuran / 12 h / Heating 3: 76 percent / NaBH4, methanol / 1 h / Ambient temperature View Scheme

sodium hydroxide; borane; dihydrogen peroxide; sodium hydride Multistep reaction;

hydrogen cation Multistep reaction;