Multi-step reaction with 6 steps
1: 1.) 1-hydroxybenzotriazole hydrate, 1-ethyl-3-(3-(dimethylamino)propyl)carbodiimide hydrochloride / 1.) CH2Cl2, 15 min, 2.) CH2Cl2, MeOH, overnight
2: TFA / CH2Cl2 / 1 h
3: 1.) 1-hydroxy-7-azabenzotriazole, 1-ethyl-3-(3-(dimethylamino)propyl)carbodiimide hydrochloride, 2.) diisopropylethylamine / 1.) CH2Cl2, DMF, 15 min, 2.) CH2Cl2, DMF, overnight
4: TFA / CH2Cl2 / 0.17 h
5: 1.) 1-hydroxy-7-azabenzotriazole, 1-ethyl-3-(3-(dimethylamino)propyl)carbodiimide hydrochloride, 2.) diisopropylethylamine / 1.) CH2Cl2, DMF, 15 min, 2.) CH2Cl2, DMF, overnight
6: TFA / CH2Cl2 / 0.12 h
With
1-hydroxy-7-aza-benzotriazole; 1-hydroxybenzotriazol-hydrate; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid;
In
dichloromethane;
DOI:10.1021/jm980197u