in anhydrous butyl ether; toluene T=-78 - 100°C; 1 h; Inert atmosphere;

tetrabutylammomium bromide; palladium diacetate; caesium carbonate; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene in 1,4-dioxane T=120°C; Buchwald-Hartwig Coupling; 0.5 h; Microwave irradiationInert atmosphereSealed tube;