反应详情

Into a 25-mL round-bottom flask equipped with a stir bar was added sequentially 4-((8-azabicyclo[3.2.1]octan-3-yloxy)methyl)-5-cyclopropyl-3-(2-(trifluoromethoxy)phenyl)isoxazole (I-1H) (0.525 g, 1.29 mmol), 3.6 mL of N,N-dimethylacetamide, cesium carbonate (1.08 g, 3.31 mmol), and methyl 2-bromo-4-fluorobenzo[d]thiazole-6-carboxylate (1.12 g, 3.87 mmoles). After stirring the resulting slurry at room temperature for 10 minutes, the mixture was then warmed to 60° C. and stirred for 1 h. The reaction slurry was allowed to cool to RT, and was diluted with 200 mL of ethyl acetate and washed with water (3×30 mL). The organic extracts were concentrated under vacuum and directly purified using normal phase silica gel chromatography (40 g silica column) with a 15 min gradient of 10% to 60% ethyl acetate/hexanes. Desired fractions were concentrated in vacuo, and the resulting residue crystallized upon standing to give the desired product as a white crystalline solid.

1. customInto a 25-mL round-bottom flask equipped with a stir bar
2. temperaturethe mixture was then warmed to 60° C.
3. stirringstirred for 1 h
4. temperatureto cool to RT
5. washwashed with water (3×30 mL)
6. concentrationThe organic extracts were concentrated under vacuum
7. customdirectly purified
8. customwith a 15 min
9. concentrationDesired fractions were concentrated in vacuo
10. customthe resulting residue crystallized