1: 10percent aq. NaOH / 6 h / Heating 2: 71 percent / thionyl chloride / 1 h / Heating View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.) n-BuLi / 1.) THF, hexane, -60 deg C, 10 min, 2.) -65 deg C, 30 min<br />2: propionic acid / 145 - 180 &deg;C<br /> <br /> &nbsp;