1: ortho-trifluoromethylbenzoic acid With sec.-butyllithium in tetrahydrofuran; cyclohexane T=-78°C; 1 h; 2: methyl iodide in tetrahydrofuran; cyclohexane T=-78 - 25°C; 16 h; 3: With hydrogenchloride; sodium hydrogencarbonate more than 3 stages;