in various solvent(s) 2 h;

1: 90 percent 2: 56 percent / ethanol / 72 h / Ambient temperature 3: 75 percent / 1.) Br2 / acetic acid / 1.) 18-20 deg C, 15 min, 2.) 80-85 deg C, 3 h 4: 72 percent / various solvent(s) / 2 h View Scheme

1: 75 percent / 1.) Br2 / acetic acid / 1.) 18-20 deg C, 15 min, 2.) 80-85 deg C, 3 h 2: 72 percent / various solvent(s) / 2 h View Scheme

1: 56 percent / ethanol / 72 h / Ambient temperature 2: 75 percent / 1.) Br2 / acetic acid / 1.) 18-20 deg C, 15 min, 2.) 80-85 deg C, 3 h 3: 72 percent / various solvent(s) / 2 h View Scheme

8 h;