1: 3-phenyl-2-propenoic acid With triethylamine; methyl chloroformate in dichloromethane T=20°C; 2 h; Cooling with ice; 2: 3-amino-propan-1-ol in dichloromethane T=20°C;

3,3',5,5'-tetra-t-butyl-1,1'-bi(2,5-cyclohexadienyl)-4,4'-dione; 1,3-dimethyltriazolium iodide; 1,8-diazabicyclo[5.4.0]undec-7-ene in tetrahydrofuran T=20°C; chemoselective reaction;