1: 1.) Mg / 1.) Et2O, reflux, 45 min, 2.) Et2O, room temp., 1 h 2: 60 percent / Jones reagent / acetone / 0.17 h / Ambient temperature 3: 51 percent / HBr (gas) / pentane / 0.5 h / Irradiation 4: 12.5 g / NaOEt, NaI / ethanol / 16 h / Heating View Scheme

1: 51 percent / HBr (gas) / pentane / 0.5 h / Irradiation 2: 12.5 g / NaOEt, NaI / ethanol / 16 h / Heating View Scheme

1: 60 percent / Jones reagent / acetone / 0.17 h / Ambient temperature 2: 51 percent / HBr (gas) / pentane / 0.5 h / Irradiation 3: 12.5 g / NaOEt, NaI / ethanol / 16 h / Heating View Scheme

sodium ethanolate; sodium iodide in ethanol 16 h; Heating;