Reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([NH:8][CH:9]2[CH2:14][CH2:13][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:11][CH2:10]2)[N:5]2[N:22]=[CH:23][CH:24]=[C:4]2[N:3]=1.O=P(Cl)(Cl)Cl.CN([CH:33]=[O:34])C>>[Cl:1][C:2]1[CH:7]=[C:6]([NH:8][CH:9]2[CH2:10][CH2:11][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:19])[CH3:20])=[O:16])[CH2:13][CH2:14]2)[N:5]2[N:22]=[CH:23][C:24]([CH:33]=[O:34])=[C:4]2[N:3]=1Participants
4
Procedure
To tert-butyl 4-(5-chloropyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate (1.7 g, 4.8 mmol) in DMF (36 mL), POCl3 (7.7 mL, 82.9 mmol) was added dropwise at room temperature. After the addition was complete, the reaction was stirred for 8 hours. Then, the reaction was quenched by slow addition to ice cold 6N NaOH. The mixture was diluted with water and the solid was collected by filtration. The solid was washed several more times with water then dried under vacuum overnight. The product, tert-butyl 4-(5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate, was collected as a solid in 48% yield. LCMS (M+1=380)
Workup
- additionAfter the addition
- customThen, the reaction was quenched by slow addition to ice cold 6N NaOH
- additionThe mixture was diluted with water
- filtrationthe solid was collected by filtration
- washThe solid was washed several more times with water
- customthen dried under vacuum overnight
- customThe product, tert-butyl 4-(5-chloro-3-formylpyrazolo[1,5-a]pyrimidin-7-ylamino)piperidine-1-carboxylate, was collected as a solid in 48% yield
Sources & evidence
- ORD record
- ord-71f6d6e668974a8e97a0494cb2c23cfc
- Source dataset
- uspto-grants-2016_04
- Patent number
- US09303033B2
Linked notes
Loading…