1: 50 percent / various solvent(s) / 6 h / 140 - 150 °C 2: 1.) potassium, t-BuOH / 1.) dioxane, 60 deg C, 3 h, 2.) dioxane, RT, overnight 3: 1.) sodium hydride / 1.) DMF, a) RT, 3 h, b) 60 deg C, 1 h, 2.) 2 d View Scheme

1: 50 percent / various solvent(s) / 6 h / 140 - 150 °C 2: 1.) potassium, t-BuOH / 1.) dioxane, 60 deg C, 3 h, 2.) dioxane, RT, overnight 3: 1.) sodium hydride / 1.) DMF, a) RT, 3 h, b) 60 deg C, 1 h, 2.) 2 d View Scheme

1: 1.) potassium, t-BuOH / 1.) dioxane, 60 deg C, 3 h, 2.) dioxane, RT, overnight 2: 1.) sodium hydride / 1.) DMF, a) RT, 3 h, b) 60 deg C, 1 h, 2.) 2 d View Scheme

sodium hydride 1.) DMF, a) RT, 3 h, b) 60 deg C, 1 h, 2.) 2 d; Yield given. Multistep reaction;

sulfuric acid; methoxybenzene; trifluoroacetic acid T=110°C; 8 h;