sodium hydroxide in methanol Reflux;

<b>Multi-step reaction with 2 steps<br /> </b>1.1: boron trifluoride diethyl etherate / benzene / 2 h / Reflux<br />2.1: isopentyl nitrite; trichloroacetic acid / tetrahydrofuran / 0 - 20 &deg;C / Molecular sieve<br />2.2: 0.25 h<br />2.3: 130 &deg;C<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1.1: boron trifluoride diethyl etherate / benzene / 2 h / |Dean-Stark; |Reflux<br />2.1: trichloroacetic acid; isopentyl nitrite / tetrahydrofuran / 1 h / 0 - 20 &deg;C<br />2.2: |Reflux<br /> <br /> &nbsp;