1: 1.) triethylamine (1.2 to 1.5 molar equiv.) / CH2Cl2 / Ambient temperature 2: methylhydrazine / CH2Cl2 / 1.) 2 h, r.t; 2.) 8 h, 35 deg C; 3.) r.t 3: propylene oxide / CH2Cl2 / 1.5 h / Ambient temperature 4: 68 mg / >1.6 molar equiv. K2S2O8, K2HPO4 / acetonitrile; H2O / 2 h / Heating View Scheme

1: 1.) triethylamine (1.2 to 1.5 molar equiv.) / CH2Cl2 / Ambient temperature 2: methylhydrazine / CH2Cl2 / 1.) 2 h, r.t; 2.) 8 h, 35 deg C; 3.) r.t 3: propylene oxide / CH2Cl2 / 1.5 h / Ambient temperature 4: 75 percent / >1.6 molar equiv. K2S2O8, K2HPO4 / acetonitrile; H2O / 2 h / Heating View Scheme

magnesium sulfate in dichloromethane T=0 - 5°C; 2 h;