trifluorormethanesulfonic acid; methoxybenzene; trifluoroacetic acid T=40°C; 6 h;

1: 100 percent / NaH / tetrahydrofuran / 1 h / 20 °C 2: 57 percent / anisole; trifluoroacetic acid; trifluoromethanesulfonic acid / 6 h / 40 °C View Scheme

1: 73 percent / NaOH / H2O; methanol / 1 h / 20 °C 2: 54 percent / NaH; tetra-n-butylammonium iodide / tetrahydrofuran; dimethylformamide / 1 h / 70 °C 3: 100 percent / NaH / tetrahydrofuran / 1 h / 20 °C 4: 57 percent / anisole; trifluoroacetic acid; trifluoromethanesulfonic acid / 6 h / 40 °C View Scheme

1: 54 percent / NaH; tetra-n-butylammonium iodide / tetrahydrofuran; dimethylformamide / 1 h / 70 °C 2: 100 percent / NaH / tetrahydrofuran / 1 h / 20 °C 3: 57 percent / anisole; trifluoroacetic acid; trifluoromethanesulfonic acid / 6 h / 40 °C View Scheme