tetrabutyl ammonium fluoride in tetrahydrofuran 24 h; Heating;

<b>Multi-step reaction with 2 steps<br /> </b>1: 84 percent / tetrabutylammonium hidrogen sulfate, 50percent aq. sodium hydroxide / CH₂Cl₂ / 20 h / Ambient temperature<br />2: 26 percent / AlCl₃ / 4.5 h / Heating<br /> <br /> &nbsp;