3,3-dimethyldioxirane 1) acetone, 15 min, RT, 2) toluene, reflux, 2 h; Yield given. Multistep reaction;

<b>Multi-step reaction with 2 steps<br /> </b>1: 62 percent / tetrahydrofuran<br />2: 58 percent / pyridine / CHCl₃ / 8 h / 60 &deg;C<br /> <br /> &nbsp;