in dichloromethane; toluene; Petroleum ether

Lawesson's reagent in toluene 4 h; Heating;

&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1071255', constants.ctx, '0')"><i>N</i>-methyl-acetamide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '8400700', constants.ctx, '0')">Petroleum ether</a> <br /> <br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '6826', constants.ctx, '0')">1,1'-carbonyldiimidazole</a> <br />&nbsp;1.) DMF, 1 h, 2.) 3 d;&nbsp;&nbsp;Yield given. Multistep reaction;&nbsp;<br /> &nbsp;