sodium tetrahydroborate; ozone 1.) methanol; Yield given. Multistep reaction;

<b>Multi-step reaction with 3 steps<br /> </b>1: 1) NaH, n-BuLi / 1) THF, -20 deg C<br />2: NaBH₄, BEt₃ / tetrahydrofuran; methanol / -78 &deg;C<br />3: H+<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 1) NaH, n-BuLi / 1) THF, -20 deg C<br />2: NaBH₄, BEt₃ / tetrahydrofuran; methanol / -78 &deg;C<br />3: H+<br /> <br /> &nbsp;

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '472690', constants.ctx, '0')">toluene-4-sulfonic acid</a> <br />16&nbsp;h;&nbsp;<br /> &nbsp;