1: 94 percent / (diethylamino)sulfur trifluoride / ZnI2 / CHCl3 / 16 h / Ambient temperature 2: 82 percent / 3-chloroperbenzoic acid 3: 80 percent / 0.67 h / 160 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 98 percent / methanol / Ambient temperature<br />2: 80 percent / 3-chloroperbenzoic acid / CH₂Cl₂ / 0 &deg;C<br /> <br /> &nbsp;