in dichloromethane Heating; Yield given;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1446024', constants.ctx, '0')">methanesulfonic acid</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '3587155', constants.ctx, '0')">water</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '102391', constants.ctx, '0')">tetrahydrofuran</a> <br />T=0&deg;C;&nbsp;2&nbsp;h;&nbsp;<br /> &nbsp;