1: 95 percent / K2CO3 / acetone / 4 h / Heating 2: 76 percent / I2; pyridine / 4 h / Heating 3: 99 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 4: 90 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.33 h / 0 - 20 °C 5: 99 percent / K2CO3 / acetone; CH2Cl2 / 4 h / Heating View Scheme

1: 95 percent / K2CO3 / acetone / 4 h / Heating 2: 76 percent / I2; pyridine / 4 h / Heating 3: 99 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C View Scheme

1: 95 percent / K2CO3 / acetone / 4 h / Heating 2: 76 percent / I2; pyridine / 4 h / Heating 3: 99 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 4: 90 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.33 h / 0 - 20 °C 5: 100 percent / K2CO3 / acetone / 1 h / Heating View Scheme

1: 95 percent / K2CO3 / acetone / 4 h / Heating 2: 76 percent / I2; pyridine / 4 h / Heating 3: 99 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 4: 90 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.33 h / 0 - 20 °C View Scheme

1: 95 percent / K2CO3 / acetone / 4 h / Heating 2: 76 percent / I2; pyridine / 4 h / Heating View Scheme