sodium hydroxide in methanol 6 h; Ambient temperature;

<b>Multi-step reaction with 3 steps<br /> </b>1: 75 percent / NaOMe / 4 h / Heating<br />2: 6 N aq. HCl / 4 h / Heating<br />3: 91 percent / p-TsOH*H₂O / toluene / 30 h / Heating<br /> <br /> &nbsp;