1: methyl 2-(3-chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate With lithium hexamethyldisilazane in tetrahydrofuran T=0°C; 0.5 h; Inert atmosphere; 2: ethylene dibromide T=0°C; 0.0833333 h;