in tetrahydrofuran T=-70°C; 1 h;

1: 63.2 percent / triethylamine / benzene / 4 h / Heating 2: 76 percent / tetrahydrofuran / 1 h / -70 °C View Scheme

1: 81.4 percent / potassium permanganate / acetic acid / Ambient temperature 2: 63.2 percent / triethylamine / benzene / 4 h / Heating 3: 76 percent / tetrahydrofuran / 1 h / -70 °C View Scheme

1: 67.4 percent / iodine / benzene / 5/10 deg C, 20/25 deg C 2: 81.4 percent / potassium permanganate / acetic acid / Ambient temperature 3: 63.2 percent / triethylamine / benzene / 4 h / Heating 4: 76 percent / tetrahydrofuran / 1 h / -70 °C View Scheme