1: 82 percent / DMAP / acetonitrile / 16 h / 25 °C 2: 92 percent / Bu3SnH, AIBN / toluene / 5 h / 120 °C 3: 88 percent / AcOH, H2SO4 / CHCl3 / 16 h / 4 °C 4: 46 percent / HMDS, TMS-Cl, CF3SO3H / acetonitrile / 5 h / 80 °C 5: 83 percent / DBU / tetrahydrofuran / 55 h / 60 °C 6: 83 percent / DMAP / acetonitrile / 16 h / 25 °C 7: 89 percent / Bu3SnH, AIBN / toluene / 5 h / 120 °C 8: 50 percent / LiN3, BzOH / dimethylformamide / 20 h / 120 °C 9: 82 percent / NaOCH3 / methanol / 16 h View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '103233', constants.ctx, '0')">pyridine</a> <br />16&nbsp;h;&nbsp;&nbsp;-30 deg C --&gt; 25 deg C;&nbsp;<br /> &nbsp;