toluene-4-sulfonic acid in methanol; water T=80°C; 2 h;

<b>Multi-step reaction with 2 steps<br /> </b>1.1: trifluorormethanesulfonic acid / 48 h / 0 - 80 &deg;C<br />1.2: 4 h / 40 &deg;C<br />2.1: sodium hydroxide / N,N-dimethyl-formamide / 24 h / 20 &deg;C<br /> <br /> &nbsp;