反应详情

To a stirred mixture of Trans-4-[2-(4-Benzo[1,3]dioxol-4-yl-piperazin-1-yl)-ethyl]-cyclohexylamine trihydrochloride (Intermediate A) (50 mg, 0.136 mmol) in DMF (1 ml) was added N,N-diisopropylethylamine (62 mg, 0.0831 ml, 0.476 mmol), acetic acid (9.8 mg, 9.33 μl, 0.163 mmol) and TBTU (52.4 mg, 0.163 mmol). The mixture was allowed to stir at room temperature for 4 h and poured into ice/water (0.5 ml). The crude reaction mixture was concentrated in vacuo. The reaction mixture was solved with sat NaHCO3 (1×10 mL). and extracted with dichloromethane (2×20 mL). The organic layers were dried over MgSO4 and concentrated in vacuo. The crude material was purified by flash chromatography (silica gel, 100 g, 0% to 20% MeOH in dichloromethane) to yield the title compound as an off-white solid (53 mg, 62%), MS (ISP) m/z=374.3 [(M+H)+].

1. customThe crude reaction mixture
2. concentrationwas concentrated in vacuo
3. extractionand extracted with dichloromethane (2×20 mL)
4. dry with materialThe organic layers were dried over MgSO4
5. concentrationconcentrated in vacuo
6. customThe crude material was purified by flash chromatography (silica gel, 100 g, 0% to 20% MeOH in dichloromethane)