1: 5.08 g / m-chloroperbenzoic acid / CH2Cl2 / 96 h / Ambient temperature 2: Jones reagent / acetone / 0.83 h / Ambient temperature 3: 3.47 g / p-TsOH*H2O / benzene / 2 h / Heating 4: hydrogen / 2percent Pd/SrCO3 / ethanol View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 93 percent / NaB(OAc)3H / acetic acid / 4 h / Ambient temperature<br />2: 1.) O₃, 2.) NaI / 1.) MeOH, CH₂Cl₂, -73 deg C, 5 h, 2.) MeOH, CH₂Cl₂, AcOH, 0 deg C, 15 min, and room temperature, 1 h<br /> <br /> &nbsp;