potassium hydroxide in methanol; water Yield given;

<b>Multi-step reaction with 3 steps<br /> </b>1: 83 percent / tetrahydrofuran; diethyl ether / 3 h / -78 &deg;C<br />2: NCS, AgNO₃ / H₂O; acetonitrile<br />3: I₂, KOH / 43 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: NCS, AgNO₃ / H₂O; acetonitrile<br />2: I₂, KOH / 43 &deg;C<br /> <br /> &nbsp;