1: BF3*Et2O / CH2Cl2 / 0.17 h / -78 °C 2: potassium hydride / tetrahydrofuran 3: TFA / CH2Cl2 / 1 h 4: 64 percent / cuprous chloride, palladium chloride / dimethylformamide / 14 h 5: 29 percent / β-alanine, toluene, acetic acid / 5 h / Heating View Scheme

1: 64 percent / cuprous chloride, palladium chloride / dimethylformamide / 14 h 2: 29 percent / β-alanine, toluene, acetic acid / 5 h / Heating View Scheme

1: TFA / CH2Cl2 / 1 h 2: 64 percent / cuprous chloride, palladium chloride / dimethylformamide / 14 h 3: 29 percent / β-alanine, toluene, acetic acid / 5 h / Heating View Scheme

1: potassium hydride / tetrahydrofuran 2: TFA / CH2Cl2 / 1 h 3: 64 percent / cuprous chloride, palladium chloride / dimethylformamide / 14 h 4: 29 percent / β-alanine, toluene, acetic acid / 5 h / Heating View Scheme

acetic acid; toluene; 3-aminopropionic acid 5 h; Heating;