potassium acetate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride in 1,4-dioxane T=100°C; 3 h;

1: 4-(4-chlorophenyl)iodobenzene With n-butyllithium in diethyl ether; hexane T=-78°C; Inert atmosphere; 2: With boric acid trimethyl ester in diethyl ether; hexane T=-78 - 20°C; 3: 2,3-dimethylbutane-2,3-diol Further stages;