1: HCl 2: 50 percent / Cu / pyridine View Scheme

manganese(IV) oxide in dichloromethane T=20°C; Oxidation;

1: 94 percent / Et3N / CH2Cl2 / 0 °C 2: 87 percent / acetonitrile; CH2Cl2 / 20 °C / Electrochemical reaction 3: 60 percent / Na; naphthalene / 1,2-dimethoxy-ethane / 0 °C 4: 74 percent / MnO2 / CH2Cl2 / 20 °C View Scheme

1: 87 percent / acetonitrile; CH2Cl2 / 20 °C / Electrochemical reaction 2: 60 percent / Na; naphthalene / 1,2-dimethoxy-ethane / 0 °C 3: 74 percent / MnO2 / CH2Cl2 / 20 °C View Scheme

1: 60 percent / Na; naphthalene / 1,2-dimethoxy-ethane / 0 °C 2: 74 percent / MnO2 / CH2Cl2 / 20 °C View Scheme