Multi-step reaction with 7 steps
1.1: chlorosulfonic acid / dichloromethane / 20 °C
2.1: thionyl chloride; N,N-dimethyl-formamide / 1,2-dichloro-ethane / 2 h / Reflux
3.1: triethylamine / dichloromethane / 2 h / 20 °C / Reflux
4.1: sodium hydroxide / ethanol; water / 4 h / 80 °C
4.2: pH 1 / Cooling with ice
5.1: 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; benzotriazol-1-ol / N,N-dimethyl-formamide / 20 °C
6.1: trifluoroacetic acid / 20 °C
7.1: 1,1'-carbonyldiimidazole; 1,8-diazabicyclo[5.4.0]undec-7-ene / N,N-dimethyl-formamide / 3 h / 80 °C
With
chlorosulfonic acid; thionyl chloride; benzotriazol-1-ol; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; N,N-dimethyl-formamide; 1,1'-carbonyldiimidazole; trifluoroacetic acid; sodium hydroxide;
In
ethanol; dichloromethane; water; 1,2-dichloro-ethane; N,N-dimethyl-formamide;