1: diisopropylamine With n-butyllithium in tetrahydrofuran T=-78°C; 1.75 h; 2: 1-(1H-1,2,3-benzotriazol-1-yl)-2-(phenylsulfanyl)-1-ethanone in tetrahydrofuran T=-78 - 20°C;

sodium hydroxide in ethanol 2 h; Heating;

in dichloromethane T=-5 - 20°C;