ortho-methylbenzoic acid T=150°C; 3 h;

<b>Multi-step reaction with 2 steps<br /> </b>1: 95 percent / TosOH / benzene / Heating<br />2: 72 percent / KOtBu / dimethylsulfoxide / 48 h / 80 &deg;C<br /> <br /> &nbsp;