pyridinium chlorochromate in dichloromethane 1 h; Ambient temperature;

<b>Multi-step reaction with 4 steps<br /> </b>1: 83 percent / K₂CO₃ / acetone / 3 h / Heating<br />2: 70 percent / polyphosphoric acid / 1.5 h / 45 - 50 &deg;C<br />3: 81.5 percent / aq. NaOCl / 0.67 h / 60 - 70 &deg;C<br />4: 74 percent / LiAlH₄ / tetrahydrofuran / 12 h / Heating<br /> <br /> &nbsp;