1: 73 percent / pyridinium chlorochromate / CH2Cl2 / 16.5 h / Ambient temperature 2: (+)-chlorodiisopinocampheylborane / Ambient temperature View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1209227', constants.ctx, '0')">n-butyllithium</a>&nbsp;<b>in</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '1696894', constants.ctx, '0')">diethyl ether</a> <br />T=-78 - 20&deg;C;&nbsp;<br /> &nbsp;