1: m-Chloroperbenzoic acid (85percent), NaHCO3 / CCl4; H2O / 1 h / 0 °C 2: 1.) NBS; 2.) 1,5-Diazabicyclo<5.4.0>undec-5-ene / 1.) CCl4, reflux, 1 h, sunlamp; 2.) CH2Cl2, 25 deg C, 0.5 h View Scheme

1: m-Chloroperbenzoic acid (85percent), NaHCO3 / CCl4; H2O / 1 h / 0 °C 2: 1.) NBS; 2.) 1,5-Diazabicyclo<5.4.0>undec-5-ene / 1.) CCl4, reflux, 1 h, sunlamp; 2.) CH2Cl2, 25 deg C, 0.5 h 3: pyridine / 0.17 h / Heating View Scheme