pyridinium chlorochromate in dichloromethane T=20°C; 1 h;

1: 83 percent / N-bromosuccinimide; benzoyl peroxide / CCl4 / 1 h / Heating 2: 80 percent / NaHCO3; water / acetone / 5 h / Heating 3: 94 percent / pyridinium chlorochromate; silica gel / CH2Cl2 / 0.25 h / 20 °C 4: 91 percent / diethyl ether / 0 - 20 °C 5: 93 percent / pyridinium chlorochromate / CH2Cl2 / 1 h / 20 °C View Scheme

1: 91 percent / diethyl ether / 0 - 20 °C 2: 93 percent / pyridinium chlorochromate / CH2Cl2 / 1 h / 20 °C View Scheme

1: 94 percent / pyridinium chlorochromate; silica gel / CH2Cl2 / 0.25 h / 20 °C 2: 91 percent / diethyl ether / 0 - 20 °C 3: 93 percent / pyridinium chlorochromate / CH2Cl2 / 1 h / 20 °C View Scheme

1: 80 percent / NaHCO3; water / acetone / 5 h / Heating 2: 94 percent / pyridinium chlorochromate; silica gel / CH2Cl2 / 0.25 h / 20 °C 3: 91 percent / diethyl ether / 0 - 20 °C 4: 93 percent / pyridinium chlorochromate / CH2Cl2 / 1 h / 20 °C View Scheme