1,8-diazabicyclo[5.4.0]undec-7-ene in ethanol; benzene 6 h; Inert atmosphereUV-irradiation;

Stage #1: <a href="#" onclick="return RXDsubstances(event, this, '', constants.ctx, '0')">4-fluorobenzyl halide</a> <b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1079456', constants.ctx, '0')">triphenyl phosphite</a> <br />T=140&deg;C;&nbsp;4&nbsp;h;&nbsp;<br />Stage #2: <b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3592982', constants.ctx, '0')">sodium methylate</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102391', constants.ctx, '0')">tetrahydrofuran</a> <br />0.5&nbsp;h;&nbsp;&nbsp;Cooling with ice;&nbsp;<br />Stage #3: <a href="#" onclick="return RXDsubstances(event, this, '105852', constants.ctx, '0')">furan-3-carboxaldehyde</a> &nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102391', constants.ctx, '0')">tetrahydrofuran</a> <br />T=20&deg;C;&nbsp;Wittig-Horner reaction;&nbsp;<br /> <br /> &nbsp;