sodium hydrogencarbonate in tetrahydrofuran; water 4 h; Heating;

<b>Multi-step reaction with 3 steps<br /> </b>1: 80 percent / m-chloroperbenzoic acid / CH₂Cl₂ <br />2: 67 percent / lithium diisopropylamide, hexamethylphosphortriamide / tetrahydrofuran / -78 &deg;C<br />3: tetrafluoroboric acid (50percent) / CH₂Cl₂; H₂O / 7 h / Heating<br /> <br /> &nbsp;

<b>Multi-step reaction with 2 steps<br /> </b>1: 67 percent / lithium diisopropylamide, hexamethylphosphortriamide / tetrahydrofuran / -78 &deg;C<br />2: tetrafluoroboric acid (50percent) / CH₂Cl₂; H₂O / 7 h / Heating<br /> <br /> &nbsp;