2: 73 percent / py2.CrO3 / CH2Cl2 / 24 h 3: K2CO3 / methanol; H2O / 1 h View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: pyridine<br />2: 80 percent / NaOMe / methanol / 1.5 h / Heating<br />3: NaBH₄ / methanol; H₂O / 0.25 h / 0 &deg;C<br /> <br /> &nbsp;