1: propionic acid With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride in N,N-dimethyl-formamide T=20°C; 1 h; 2: 5 -Bromo -pyridin-3 -ylamine With 4-methyl-morpholine in N,N-dimethyl-formamide T=20°C; 18 h;