3-chloro-benzenecarboperoxoic acid in chloroform T=-15°C; 1.5 h;

1: SOCl2 / benzene / 1.) RT, overnight, 2.) reflux, 1 h 2: pyridine / 72 h / Ambient temperature 3: 55 percent / POCl3 / pyridine / 3 h / 0 - 20 °C 4: 76 percent / m-chloroperbenzoic acid / CHCl3 / 1.5 h / -15 °C View Scheme

1: 55 percent / POCl3 / pyridine / 3 h / 0 - 20 °C 2: 76 percent / m-chloroperbenzoic acid / CHCl3 / 1.5 h / -15 °C View Scheme

1: pyridine / 72 h / Ambient temperature 2: 55 percent / POCl3 / pyridine / 3 h / 0 - 20 °C 3: 76 percent / m-chloroperbenzoic acid / CHCl3 / 1.5 h / -15 °C View Scheme