1: 1.) LiBH4, 2.) aq. HCl / 1.) THF, room temperature, 4 h, 2.) 1 h 2: 84 percent / PCC / CH2Cl2 / Ambient temperature View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.) n-BuLi / 1.) THF, hexane, -30 deg C, 30 min, 2.) THF, hexane, -30 deg C, 1 h<br />2: 1.) LDA / 1.) THF, -78 deg C, 1 h, 2.) THF, -78 deg C (1 h), -&gt; 40 deg C<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '906717', constants.ctx, '0')">lithium diisopropyl amide</a> <br />&nbsp;1.) THF, -78 deg C, 1 h, 2.) THF, -78 deg C (1 h), -&gt; 40 deg C;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;