potassium tert-butylate in water; N,N-dimethyl-formamide T=20°C; 24 h; air; regioselective reaction;

1: phenylacetylene With ethylmagnesium halide in tetrahydrofuran T=50°C; 0.25 h; 2: 1-azido-3-(trifluoromethyl)benzene in tetrahydrofuran 1 h; 3: With ammonium chloride; water in tetrahydrofuran