1: NaH / dimethylsulfoxide; tetrahydrofuran / Ambient temperature 2: 30percent KOH/MeOH / 0 °C 3: BF3*OEt2 / CCl4 / -15 °C 4: activated MnO2 / diethyl ether / 0 °C View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '103233', constants.ctx, '0')">pyridine</a> <br /> <br /> <br /> &nbsp;