1: 82 percent / pyridine / CH2Cl2 / 1) 0 deg C, 1 h; 2) 5 deg C, 12 h 2: 97.5 percent / LiAlH4 / tetrahydrofuran / 2 h / Heating 3: 1.) (CH3)2S*BF3, 2.) hydrogen peroxide, aq. NaOH / 1) THF, room temperature, 16 h; 2) 40 deg C, 2 h View Scheme

1: 97.5 percent / LiAlH4 / tetrahydrofuran / 2 h / Heating 2: 1.) (CH3)2S*BF3, 2.) hydrogen peroxide, aq. NaOH / 1) THF, room temperature, 16 h; 2) 40 deg C, 2 h View Scheme

sodium hydroxide; boron dimethyl-trifluoro sulphide; dihydrogen peroxide 1) THF, room temperature, 16 h; 2) 40 deg C, 2 h; Multistep reaction;