1: 67.1 percent / K2CO3 / acetone / 72 h / Heating 2: 85.6 percent / N-bromosuccinimide, dibenzoylperoxide / CCl4 / 9 h / Heating View Scheme

1: 88 percent / pyridine / 1) 1 h, 2) overnight, 30 deg C 2: 87 percent / N-bromosuccinimide, dibenzoyl peroxide / CCl4 / 10 h / Heating 3: 80 percent / 0.1N aq. methanolic sodium hydroxide / 3.5 h / 100 °C View Scheme