1: 98 percent / Br2 / CCl4 / 0 °C 2: 1.3 g / DBN / diethyl ether / 10 h / 0 °C 3: 92 percent / KF / methanol / 2 h / 0 °C 4: 92 percent / phosphate buffer / tetrahydrofuran; H2O / pH 7.0 View Scheme

1: 98 percent / Br2 / CCl4 / 0 °C 2: 1.3 g / DBN / diethyl ether / 10 h / 0 °C 3: 92 percent / KF / methanol / 2 h / 0 °C View Scheme

bromine in tetrachloromethane T=0°C;