1: diethyl ether / 1.5 h 2: 70 percent / POCl3 / 0 °C 3: diethyl ether / 1.5 h 4: 87 percent / BF3*Et2O / 16 h / Heating View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '956581', constants.ctx, '0')">trichlorophosphate</a> <br />T=0&deg;C;&nbsp;Vilsmeier-Haack reaction;&nbsp;<br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: NaBH₄ / ethanol / 1.5 h / Heating<br />2: 70 percent / POCl₃ / 0 &deg;C<br /> <br /> &nbsp;