hydrogenchloride; water; sodium nitrite

1: H2SO4 2: ethanol; N2H4+H2O / anschliessend mit wss. HCl 3: sodium nitrite; water; hydrochloric acid View Scheme

1: ethanol; N2H4+H2O / anschliessend mit wss. HCl 2: sodium nitrite; water; hydrochloric acid View Scheme

water in alkaline medium in acetone Ambient temperature; Rate constant;

hydrogen; platinum(IV) oxide in methanol T=40°C; P=2574.3 Torr;

Br3(1-)*C10H15NPol(1+); dimethyl sulfoxide T=20°C; 4 h;

1: 98 percent / H2, / PtO2, / methanol / 40 °C / 2574.3 Torr 2: 1.) NaH, 2.) n-BuLi, / 1.) THF, 70 to 75 deg C, 2 h, 2.) THF, hexane, -70 deg C, 30 min, 3.) THF, hexane, 5 to 10 deg C, overnight, 3: 1.) SOCl2, 2.) K2CO3, / 1.) CH2Cl2, 0 to 10 deg C, 1.5 h, 2.) DMF, RT; 18 h, 4: 60 percent / 80percent m-CPBA, / CH2Cl2 / 0.5 h View Scheme