1: 2N NaOH / tetrahydrofuran / 1 h / 20 °C 2: 51 percent / toluene; tetrahydrofuran / -45 - 20 °C View Scheme

1: (E)-2-(1H-1,2,3-benzotriazol-1-yl)-1-(4-methylphenyl)ethenyl trifluoromethanesulfonate With sodium methylate in acetonitrile T=20 - 65°C; Substitution; Elimination; 2: ethanol With hydrogenchloride Esterification; Further stages.;