1: 95 percent / 90percent aq. TFA / 0.25 h 2: 84 percent / KOAc / 0.08 h / Heating View Scheme

<b>Multi-step reaction with 2 steps<br /> </b>1: 93 percent / ozone, Me₂S / CH₂Cl₂; methanol / 12 h<br />2: 91 percent / benzene / 20 h / Heating<br /> <br /> &nbsp;