1: With potassium hydroxide in methanol; ethanol T=20°C; 2 h; 2: With methanol; sodium tetrahydroborate in ethanol T=20°C; 0.25 h; 3: With sodium tetrahydroborate; acetic acid in methanol; ethanol pH=4; Further stages.;

1.1: triethylamine; magnesium sulfate / dichloromethane / 1 h / 20 °C 1.2: 36 h / 20 °C 2.1: sodium tetrahydroborate / methanol; dichloromethane / 3 h View Scheme

sodium tetrahydroborate in methanol; dichloromethane 3 h;

ammonia in methanol