1.1: TMSOTf; TMEDA / diethyl ether / 0.5 h / 0 - 25 °C 1.2: TMEDA; n-BuLi / diethyl ether / 1 h / -78 °C 1.3: 77 percent / I2 / diethyl ether; tetrahydrofuran / 2 h / -78 °C 2.1: aq. NaOH / ethanol / 2 h View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '110354', constants.ctx, '0')">4-(N,N-dimethlyamino)pyridine</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102391', constants.ctx, '0')">tetrahydrofuran</a> <br />&nbsp;Heating;&nbsp;<br /> &nbsp;