反应详情

To a suspension of 3,5-diamino-N-[5-fluoro-4-[4-(4-methylpiperazine-1-carbonyl)-1-piperidyl]-3-pyridyl]-1H-pyrazole-4-carboxamide 9a (106 mg, 1.19 mmol) in IPA/water (1:1, 1 mL) and acetic acid (71.46 mg, 67.67 μL, 0.1078 mmol) was added 3-(diisopropylamino)-2-fluoro-prop-2-enal (41.21 mg, 0.2379 mmol). The reaction mixture was heated under reflux for 6 h and was then allowed to cool to room temperature overnight. IPA was removed in vacuo, and the resulting aqueous solution was partitioned between DCM and 2M sodium carbonate solution. The organic layer was washed with 1:1 brine/water, dried (MgSO4) filtered and concentrated in vacuo to leave a yellow solid which was stirred as a suspension in ethanol (0.5 mL) for 2 h. The solid was collected by filtration to give the desired compound I-G-4 (63 mg, 53%).

1. temperatureThe reaction mixture was heated
2. temperatureunder reflux for 6 h
3. customIPA was removed in vacuo
4. customthe resulting aqueous solution was partitioned between DCM and 2M sodium carbonate solution
5. washThe organic layer was washed with 1:1 brine/water
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customto leave a yellow solid which
10. filtrationThe solid was collected by filtration