1: 1.) N,N'-carbonyldiimidazole / 1.) DMF, 40-45 deg C, 10 min, 2.) DMF, 20 deg C, 30 min 2: 88 percent / LAH / diethyl ether / Heating View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: 72.5 percent / ethanol; H₂O / 12 h / 60 &deg;C<br />2: 70.3 percent / 10percent aq. NaOH / 24 h / Heating<br />3: 76.8 percent / 4N NaOH / 0.33 h / Ambient temperature<br /> <br /> &nbsp;