1: hexane / 16 h 2: AcOH / H2O / 0.67 h / Heating 3: 95 percent / Et3N / CH2Cl2 / 1.) 0 deg C, 5 min, 2.) 0 deg C -> room temperature, 15 min 4: 95 percent / K2CO3, LiBr / acetone / 2.5 h / Heating View Scheme