1: 98 percent / CHCl3 / 3 h / Ambient temperature 2: 75 percent Turnov. / Mg(OMe)2 / methanol / 0.75 h / Ambient temperature 3: 91 percent / HF-pyridine / tetrahydrofuran / 2 h / Ambient temperature View Scheme

1: 98 percent / CHCl3 / 3 h / Ambient temperature 2: 75 percent Turnov. / Mg(OMe)2 / methanol / 0.75 h / Ambient temperature 3: 91 percent / HF-pyridine / tetrahydrofuran / 2 h / Ambient temperature 4: 75 percent / H2O2, NaHCO3 / tetrahydrofuran / 16 h / Ambient temperature View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.) dimethylaminopyridine, 2.) imidazole / 1.) CH₂Cl₂, 2.) CH₂Cl₂ <br />2: 61 percent / dimethylaminopyridine / acetonitrile / 24 h / Ambient temperature<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.) dimethylaminopyridine, 2.) imidazole / 1.) CH₂Cl₂, 2.) CH₂Cl₂ <br />2: 61 percent / dimethylaminopyridine / acetonitrile / 24 h / Ambient temperature<br /> <br /> &nbsp;