1: trifluoromethylsulfonic anhydride; N-[(phenyl)(pyrrolidin-1-yl)methylene]benzamide in dichloromethane T=-50°C; 1.5 h; 2: ethyl DL-phenylglycinate hydrogen p-toluenesulfonate With triethylamine in dichloromethane T=20°C; 16 h; Further stages.;

magnesium sulfate; triethylamine in dichloromethane 4 h; Ambient temperature;