tetrabutylammomium bromide; potassium carbonate in acetone Williamson etherification; 22 h; Heating;

potassium hydroxide; potassium iodide in ethanol 12 h; Heating;

1: 2,6-dimethylpyridine / dichloromethane / 0.25 h / -78 °C / |Inert atmosphere 2: (N,N'-bis(2,6-diisopropylphenyl)imidazol-2-ylidene)CuOtBu; 1,1,3,3-tetramethyldisiloxane; cesium fluoride / 1,4-dioxane / 4 h / 25 °C / |Glovebox; |Inert atmosphere View Scheme