1: With diethylzinc; oxygen in n-heptane; dichloromethane T=20°C; 14 h; Darkness; 2: With ammonium chloride in n-heptane; dichloromethane; water Overall yield = 48 percent;

1: With diethylzinc; oxygen in n-heptane; dichloromethane T=20°C; 14 h; Darkness; 2: With ammonium chloride in n-heptane; dichloromethane; water Overall yield = 48 percent;