manganese(IV) oxide

<b>Multi-step reaction with 2 steps<br /> </b>1: hydrazine monohydrate / AcOH / CH₂Cl₂ / 48 h / 0 &deg;C<br />2: 71 percent / t-BuOK / tetrahydrofuran; pentane / 1.5 h / -100 &deg;C / with KDA, too<br /> <br /> &nbsp;