1: 4 percent / sodium bicarbonate, m-chloroperbenzoic acid / 0.5 h / Ambient temperature 2: 52 percent / cesium fluoride / dimethylformamide / 3 h / Ambient temperature View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 78 percent / sodium methoxide / methanol / 16 h / Heating<br />2: 50 percent / imidazole / dimethylformamide / 1.25 h / Ambient temperature<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 29 percent / triphenylphosphine, iodine, pyridine / dioxane / 7 h / Ambient temperature<br />2: 78 percent / sodium methoxide / methanol / 16 h / Heating<br />3: 50 percent / imidazole / dimethylformamide / 1.25 h / Ambient temperature<br /> <br /> &nbsp;