in water

1: 97 percent / 30percent H2O2 / H2O / 16 h / Ambient temperature 2: 1.) Et3N, CaCl2, 2.) H2SO4 / 1.) EtOH, 2.) reflux, 4 h View Scheme

1: 97 percent / 30percent H2O2 / H2O / 16 h / Ambient temperature 2: 1.) Et3N, CaCl2, 2.) H2SO4 / 1.) EtOH, 2.) reflux, 4 h 3: 59 percent / CrO3, pyridine / CH2Cl2 / 4 h / Ambient temperature View Scheme

dihydrogen peroxide in water 16 h; Ambient temperature;