dihydrogen peroxide in acetic acid 18 deg C, 52 h, 18 deg C to 70 deg C, 2 h, 70 deg C, 2 h;

1: 71 percent / NaH / tetrahydrofuran / 26 h / Ambient temperature 2: 66 percent / hydrogen peroxide / acetic acid / 18 deg C, 52 h, 18 deg C to 70 deg C, 2 h, 70 deg C, 2 h View Scheme