1: 1-bromo-3-trifluoromethyl-benzene With n-butyllithium in hexane T=0 - 20°C; 4 h; Inert atmosphere; 2: cyclopropanecarbonitrile in hexane T=20°C; 0.166667 h; Inert atmosphere; 3: With toluene-4-sulfonic acid in hexane; water T=20°C; 0.5 h; Inert atmosphere;