反应详情

温度

100 °C

A stirred mixture of 2-chloro-6-bromobenzothiazole (2.48 g, 10.0 mmol), (R)-1-(pyrrolidin-3-yl)piperidine dihydrochloride (Reference Example 5c, 2.73 g, 0.0120 mole), and potassium carbonate (6.00 g, 0.04438 mole) in N,N-dimethylformamide (15 mL) was heated to 100° C. with an oil bath for 15 hours. The reaction mixture was cooled to room temperature then poured into water (300 mL). The resulting precipitate was collected by filtration and the filter cake was rinsed with water (600 mL). The solid was dissolved in dichloromethane and the solution was dried (MgSO4) and filtered. The filtrate was concentrated under reduced pressure to give a solid that was crystallized from hot ethyl acetate to give (R)-6-bromo-2-(3-(piperidin-1-yl)pyrrolidin-1-yl)benzo[d]thiazole. 1H NMR (300 MHz, CD3OD) δ ppm 1.46-1.55 (m, 2H), 1.65 (pentet, J=5 Hz, 4H), 1.92-2.07 (m, 1H), 2.29-2.39 (m, 1H), 2.43-2.64 (m, 4H), 3.00-3.12 (m, 1H), 3.33-3.41 (m, 1H), 3.46-3.57 (m, 1H), 3.66-3.75 (m, 1H), 3.77-3.86 (m, 1H), 4.07-4.35 (m, 4H), 7.35 (d, J=9 Hz, 1H), 7.40 (dd, J=2, 9 Hz, 1H), 7.81 (d, J=2 Hz, 1H); MS (DCI/NH3) m/z 366 (M+H)+.

1. temperatureThe reaction mixture was cooled to room temperature
2. filtrationThe resulting precipitate was collected by filtration
3. washthe filter cake was rinsed with water (600 mL)
4. dissolutionThe solid was dissolved in dichloromethane
5. dry with materialthe solution was dried (MgSO4)
6. filtrationfiltered
7. concentrationThe filtrate was concentrated under reduced pressure
8. customto give a solid
9. customthat was crystallized from hot ethyl acetate