1: dimethyl 1-phenylvinylboronate With potassium fluoride; (trifluoromethyl)-trimethylsilane in ethylene glycol dimethyl ether T=20°C; 18 h; Inert atmosphere; 2: With chloro-trimethyl-silane in ethylene glycol dimethyl ether T=-20 - -10°C; 0.333333 h; Inert atmosphere; 3: diazoacetic acid ethyl ester With methanol in ethylene glycol dimethyl ether T=-20 - 20°C; 2 h; Inert atmosphere;