反应详情

Under a nitrogen atmosphere, a solution of 1-(2-aminoethyl)-2-propyl-2H-pyrazolo[3,4-c]quinolin-4-amine (0.250 g, 0.928 mmol), triethylamine (0.30 g, 3.0 mmol), and 4-fluorobenzoyl chloride (0.18 g, 1.1 mmol) in dichloromethane (7 mL) was stirred for two hours and then concentrated under reduced pressure. The residue was dissolved in methanol, and 1 N hydrochloric acid was added. The reaction was stirred for three days at room temperature and then heated at reflux overnight. A precipitate was present and was isolated by filtration and stirred with 2 M aqueous sodium carbonate. The resulting mixture was extracted with dichloromethane. The combined extracts were then concentrated under reduced pressure. The residue was purified by chromatography using an INTELLIFLASH system (eluting with 0% to 30% CMA in chloroform). The pure product was dried in a vacuum oven overnight at 90° C. to provide N-[2-(4-amino-2-propyl-2H-pyrazolo[3,4-c]quinolin-1-yl)ethyl]-4-fluorobenzamide as a white powder, mp 198-199° C.

1. concentrationconcentrated under reduced pressure
2. dissolutionThe residue was dissolved in methanol
3. addition1 N hydrochloric acid was added
4. temperatureheated
5. temperatureat reflux overnight
6. customwas isolated by filtration
7. extractionThe resulting mixture was extracted with dichloromethane
8. concentrationThe combined extracts were then concentrated under reduced pressure
9. customThe residue was purified by chromatography
10. washan INTELLIFLASH system (eluting with 0% to 30% CMA in chloroform)
11. customThe pure product was dried in a vacuum oven overnight at 90° C.