1: 100 percent / meta-chloroperoxybenzoic acid / CH2Cl2 / 0.08 h / 0 °C 2: Ambient temperature View Scheme

(i) NaH, DMSO, benzene, (ii) (heating); Multistep reaction;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3535004', constants.ctx, '0')">hydrogen sulfide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '8128175', constants.ctx, '0')">zinc(II) chloride</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1718733', constants.ctx, '0')">ethanol</a> <br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '3535004', constants.ctx, '0')">hydrogen sulfide</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '472690', constants.ctx, '0')">toluene-4-sulfonic acid</a>;&nbsp;<a href="#" onclick="return RXDsubstances(event, this, '969215', constants.ctx, '0')">trimethyl orthoformate</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1098229', constants.ctx, '0')">methanol</a> <br />T=0&deg;C;&nbsp;6&nbsp;h;&nbsp;<br /> &nbsp;