1: [(6-trifluoromethylpyridin-3-yl)methyl](methyl)oxido- λ4- sulfanylidenecyanamide With N,N,N',N',N'',N''-hexamethylphosphoric triamide; potassium hexamethylsilazane in tetrahydrofuran T=-78°C; 0.333333 h; 2: methyl iodide in tetrahydrofuran 1 h;