triethylamine in tetrahydrofuran; water 1 h; Ambient temperature;

1: 91 percent / MCPBA / CHCl3 / 3 h / Ambient temperature 2: 84 percent / Et3N / tetrahydrofuran; H2O / 1 h / Ambient temperature View Scheme

triethylamine in tetrahydrofuran; water 2 h; Ambient temperature;

1.1: 86 percent / Br2; NaOAc; H2O / acetic acid / 4 h / 20 °C 2.1: NaH / tetrahydrofuran / 0.33 h / 20 °C 2.2: tetrahydrofuran / 1 h / 20 °C 3.1: HCl; H2O / acetonitrile / 5 h / Heating 4.1: 96 percent View Scheme

sodium hydride in tetrahydrofuran 19 h; Ambient temperature;