1: carbon disulfide; 3-(trifluoromethyl)acetophenone With potassium tert-butylate in tetrahydrofuran T=0 - 20°C; 0.5 h; 2: methyl iodide in tetrahydrofuran T=20°C; 0.5 h;

sodium hydride 1.) DMSO, r.t., 3 h; 2.) DMSO, r.t., 2 h; Yield given. Multistep reaction;