sodium hydroxide in water 2 h; Reflux;

1: sodium hydroxide / water / 2 h / Reflux 2: tetrabutylammomium bromide; potassium carbonate / acetonitrile / 0.5 h / 20 °C View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: propionic acid anhydride / 100 &deg;C<br />2: polyphosphoric acid / 1 h / 100 &deg;C<br /> <br /> &nbsp;