potassium hydroxide; lithium 1.) dioxane, MeOH; 2.) NH3, THF, t-BuOH; Yield given. Multistep reaction;

<b>Multi-step reaction with 3 steps<br /> </b>1: 70 percent / NaN(SiMe₃)2 / tetrahydrofuran / -78 &deg;C<br />2: 1.) DIBAH; 2.) DMAP, Et₃N / 1.) CH₂Cl₂, -78 degC; 2.) CH₂Cl₂ <br />3: ZnBr₂ / CH₂Cl₂ / from -45 degC to 0 degC<br /> <br /> &nbsp;