sodium tetrahydroborate in water 1.16667 h; Title compound not separated from byproducts;

<b>Multi-step reaction with 2 steps<br /> </b>1: 98 percent / NaH / tetrahydrofuran / 1. 0 deg C 2. 1h, room temperature<br />2: BF₃*Et₂O / CH₂Cl₂ / 0 &deg;C<br /> <br /> &nbsp;

3&nbsp;h;&nbsp;&nbsp;steam bath;&nbsp;<br /> &nbsp;