1: ethyl chloroformate, NaHCO3 / benzene / 0.25 h 2: dimethylformamide / 20 h 3: 1) KOH; 2) HCl / 1) methanol, water, reflux, 1.5 h; 2) water, 2 h 4: 70 percent / ethanol / 4.5 h / Ambient temperature 5: 1) PCl5; 2) NaBH4 / 1) CHCl3, room t., 20 min; 2) MeOH, 1.5 h View Scheme

1: ethyl chloroformate, NaHCO3 / benzene / 0.25 h 2: dimethylformamide / 20 h 3: 1) KOH; 2) HCl / 1) methanol, water, reflux, 1.5 h; 2) water, 2 h View Scheme

<b>Multi-step reaction with 4 steps<br /> </b>1: oxalyl chloride, DMF / CH₂Cl₂ / 3 h / Ambient temperature<br />2: aq. NaOH / CH₂Cl₂ / 12 h<br />3: 98 percent / LiAlH₄ / tetrahydrofuran / 4 h / Heating<br />4: 1.) n-BuLi / 1.) THF, hexane, 0 deg C, 4 h, 2.) room temperature, 4 h<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: aq. NaOH / CH₂Cl₂ / 12 h<br />2: 98 percent / LiAlH₄ / tetrahydrofuran / 4 h / Heating<br />3: 1.) n-BuLi / 1.) THF, hexane, 0 deg C, 4 h, 2.) room temperature, 4 h<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1209227', constants.ctx, '0')">n-butyllithium</a> <br />&nbsp;1) ether, 0 deg C, 1 h; 2) 8 h;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;