1: 1.) EtOH, Mg / 1.) toluene, 2.) toluene, RT, 2 h 2: p-TsOH / H2O / 0.83 h / Heating 3: 34 percent / Ac2O / 1 h / Heating 4: 23.3 g / ethanol / 0.5 h / Ambient temperature 5: 85 percent / K2CO3, 18-crown-6-ether / tetrahydrofuran / 8 h / 70 °C 6: 90 percent / Fe, AcOH / 4.5 h / 90 °C 7: 87 percent / conc.HCl, AcOH / 2 h / Heating View Scheme

1: 1.) EtOH, Mg / 1.) toluene, 2.) toluene, RT, 2 h 2: p-TsOH / H2O / 0.83 h / Heating 3: 34 percent / Ac2O / 1 h / Heating 4: 23.3 g / ethanol / 0.5 h / Ambient temperature 5: 85 percent / K2CO3, 18-crown-6-ether / tetrahydrofuran / 8 h / 70 °C View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '4948473', constants.ctx, '0')">magnesium</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1098295', constants.ctx, '0')">tetrachloromethane</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '635760', constants.ctx, '0')">toluene</a> <br /> <br /> <br /> &nbsp;