4,4'-di-tert-butylbiphenyl; lithium in tetrahydrofuran T=20°C; 4 h;

triethylamine in toluene 0.25 h; Ambient temperature;

silver trifluoromethanesulfonate in benzene

in benzene

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

sodium azide in tetrahydrofuran; water 1.58333 h; Reflux;