sodium tetrahydroborate in methanol T=0°C; 0.0833333 h;

Multi-step reaction with 3 steps 1: 1.) L-Selectride, 2.) n-Bu4NF / 1.) THF, -78 deg C. 30 min, 2.) THF, RT, 3 h2: 26 percent / Ph3P, CBr4 / CH2Cl2 / 15 h / Ambient temperature3: 8 percent / H2O2, CF3COOAg / diethyl ether / 0.5 h / 0 °C  

Multi-step reaction with 2 steps 1: 26 percent / Ph3P, CBr4 / CH2Cl2 / 15 h / Ambient temperature2: 8 percent / H2O2, CF3COOAg / diethyl ether / 0.5 h / 0 °C