1: 50 percent / sodium hydride / dimethylsulfoxide / r. t., 2 h, 50 degC, 1 h 2: 80 percent / triethylamine, lithium perchlorate / acetonitrile / 5 h / Irradiation View Scheme

lead(IV) acetate; copper diacetate in dichloromethane T=20°C; 72 h;

dihydrogen peroxide in dichloromethane Yield given;