1: With trifluoroacetic acid in dichloromethane 2: With sodium hydroxide in dichloromethane

<b>Multi-step reaction with 2 steps<br /> </b>1: thionyl chloride / dichloromethane / 0 - 20 &deg;C<br />2: triethylamine / tetrahydrofuran / Reflux<br /> <br /> &nbsp;