Multi-step reaction with 8 steps
1: 85.9 percent / dicyclohexylcarbodiimide (DCCI), 1-hydroxybenzotriazole (HOBt), Et3N / dimethylformamide / 4 °C
2: 83.6 percent / 6N HCl, dithioethane / ethyl acetate / 1 h
3: 92 percent / Et3N / dimethylformamide / Ambient temperature
4: H2 / 5percent Pd/C / dimethylformamide; ethanol / 5 h
5: Et3N, 1-hydroxybenzotriazole (HOBt), dicyclohexylcarbodiimide (DCCI) / dimethylformamide / 4 °C
6: 64.5 percent / 3N HCl / acetic acid / 0.5 h / Ambient temperature
7: Et3N, molecular sieve / 1.5 h
8: sodium cyanoborohydride, AcOH / acetone / 1.5 h
With
hydrogenchloride; molecular sieve; hydrogen; sodium cyanoborohydride; benzotriazol-1-ol; ethane-1,2-dithiol; acetic acid; triethylamine; dicyclohexyl-carbodiimide;
palladium on activated charcoal;
In
ethanol; acetic acid; ethyl acetate; N,N-dimethyl-formamide; acetone;