dihydrogen peroxide; O,O'-dinitrodiphenyl diselenide in dichloromethane 23 h; Ambient temperature;

Multi-step reaction with 2 steps 1.1: n-BuLi / tetrahydrofuran / 0.5 h / -78 °C1.2: trimethylborate / tetrahydrofuran / 0.5 h / -78 °C1.3: HCl / tetrahydrofuran; H2O2.1: 100 percent / sodium carbonate / Pd(PPh3)4 / 1,2-dimethoxy-ethane; H2O; ethanol / Heating