1: 1.) (+)-diisopinocampheylborane dimer, 2.) NaOH, H2O2 / 1.) THF, RT, 20 h, 2.) THF, RT, 4 h 2: 61 percent / Na NH3 / tetrahydrofuran View Scheme

sodium hydroxide; (+)-diisopinocampheylborane dimer; dihydrogen peroxide 1.) THF, RT, 20 h, 2.) THF, RT, 4 h; Yield given. Multistep reaction;