potassium fluoride in methanol T=30°C; 12 h;

<b>Multi-step reaction with 2 steps<br /> </b>1: 1.) LDA / 1.) THF, -78 deg C, 30 min, 2.) THF, 30 deg C, overnight<br />2: HMPA / tetrahydrofuran / 120 h / Heating<br /> <br /> &nbsp;