1: trifluoroacetic acid / dichloromethane / 0.13 h / 0 °C / Inert atmosphere 2: dichloromethane / 0.25 h / 20 °C / Inert atmosphere 3: dichloromethane / 19 h / 20 °C / Inert atmosphere 4: sodium methylate / methanol / 1.5 h / Reflux; Inert atmosphere View Scheme

trifluoroacetic acid

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3916152', constants.ctx, '0')">tetra-(n-butyl)ammonium iodide</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '103233', constants.ctx, '0')">pyridine</a> <br />T=0&deg;C;&nbsp;0.5&nbsp;h;&nbsp;&nbsp;Inert atmosphere;&nbsp;<br /> &nbsp;