sodium carbonate; tetrakis(triphenylphosphine) palladium(0) in ethylene glycol dimethyl ether; ethanol T=20°C; 20 h; Heating / reflux;

1: With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine in acetonitrile 2: With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium acetate; 4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl-4',4',5',5'-tetramethyl-1,3,2-dioxaborolane in 2-methyl tetrahydrofuran 3: With hydrogenchloride; sodium periodate in 2-methyl tetrahydrofuran; water