反应详情

温度

25 °C

The solution of the product from step (vii) was diluted with acetonitrile (9.3 g) and activated carbon (0.2 g) was added. The mixture was stirred at 25° C. for 30 minutes, filtered through a paper filter (1 μm mesh), and washed with acetonitrile (7.0 g). Saccharin (1.32 g, 7.21 mmol) was added to the filtrate and then the quantity of the product from step is (vii) in the solution was determined by HPLC analysis. The equivalent of saccharin for the product from step (vii) was adjusted to 2.00 molar ratio with an additional charge of saccharin (0.34 g, 1.86 mmol) and the solution was concentrated under reduced pressure. The corresponding residue was diluted with acetonitrile (4.1 g) and ethyl acetate (9.6 g), heated to 40° C. and seeded with form A crystals of the title compound. After the mixture was stirred at 40° C. for 1 hour, ethyl acetate (10.6 g) was added. The mixture was stirred at 40° C. for 1 hour, cooled to 10° C. and stirred for 2 hours. The resulting solid was collected by filtration, washed with combined solution of acetonitrile (0.8 g) and ethyl acetate (3.0 g), and dried under reduced pressure to give a crude sample of the subtitle compound as a white solid, 3.11 g.

1. additionwas added
2. filtrationfiltered through a paper
3. filtrationfilter (1 μm mesh)
4. washwashed with acetonitrile (7.0 g)
5. concentrationthe solution was concentrated under reduced pressure
6. additionThe corresponding residue was diluted with acetonitrile (4.1 g) and ethyl acetate (9.6 g)
7. temperatureheated to 40° C.
8. stirringAfter the mixture was stirred at 40° C. for 1 hour
9. additionethyl acetate (10.6 g) was added
10. stirringThe mixture was stirred at 40° C. for 1 hour
11. temperaturecooled to 10° C.
12. stirringstirred for 2 hours
13. filtrationThe resulting solid was collected by filtration
14. washwashed with combined solution of acetonitrile (0.8 g) and ethyl acetate (3.0 g)
15. customdried under reduced pressure