triethylamine; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride in 1,4-dioxane; dichloromethane T=20 - 80°C; 96 h;

1: 1-bromo-4-fluoro-2-methylbenzene With sec.-butyllithium in tetrahydrofuran; cyclohexane T=-78°C; 0.75 h; 2: boric acid trimethyl ester in tetrahydrofuran; cyclohexane T=-78 - 20°C; 1 h; 3: 2,3-dimethylbutane-2,3-diol in tetrahydrofuran; cyclohexane 16 h;