Multi-step reaction with 3 steps
1: 1.) triethylamine, diphenylphosphoryl azide / 1.) toluene, 65 deg C, 2 h, 2.) toluene, 85 deg C, 24 h
2: TFA / 1.) CH2Cl2, 0 deg C, 3.5 h, 2.a.) THF, H2O, 0 deg C, 4 h, b.) THF, H2O, RT, 12 h
3: 1-hydroxybenzotriazole hydrate (HOBT), 4-methylmorpholine, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) / dimethylformamide / 1.) -23 deg C, 4 h, 2.) RT, 18 h
With
4-methyl-morpholine; diphenylphosphoranyl azide; 1-hydroxybenzotriazol-hydrate; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; trifluoroacetic acid;
In
N,N-dimethyl-formamide;
DOI:10.1021/jm00088a007