T=25°C; 18 h;

1: 82 percent / CH3COOH, β-alanine / toluene / 24 h / Heating 2: 97 percent / 18 h / 25 °C View Scheme

1: 87 percent / 1.) Br2, 2.) CH3OH / 1.) 60 deg C, 60 min, 88 deg C, 60 min, 2.) reflux 2: 82 percent / CH3COOH, β-alanine / toluene / 24 h / Heating 3: 97 percent / 18 h / 25 °C View Scheme