1: 1.) FeSO4, 2.) iron powder, acetic acid / 1.) MeCN/H2O, room temperature, 10 min, 2.) reflux, 5 min 2: m-chloroperbenzoic acid / CHCl3 3: FeSO4 / acetonitrile; H2O / 2 h / Ambient temperature View Scheme

tert.-butylhydroperoxide; iron(II) sulfate in water; acetonitrile 2 h; Ambient temperature;

iron(II) sulfate in water; acetonitrile 2 h; Ambient temperature;