1: 3-EtO2C-C6H4-I With isopropylmagnesium chloride in tetrahydrofuran T=-78°C; 0.5 h; 2: With copper (I) cyanide; lithium chloride in tetrahydrofuran 0.333333 h; 3: cyclopropionyl chloride in tetrahydrofuran T=25°C; 1 h;