Water → 4-[2-(6-Methyl-pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]-1H-quinolin-2-one

HRID 8266

Reaction equation

HRID 8266 reaction equation
[CH3:1][C:2]1[N:7]=[C:6]([C:8]2[C:9]([C:16]3[C:25]4[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=4)[N+:19]([O-])=[CH:18][CH:17]=3)=[C:10]3[CH2:15][CH2:14][CH2:13][N:11]3[N:12]=2)[CH:5]=[CH:4][CH:3]=1.FC(F)(F)C(OC(=O)C(F)(F)F)=[O:30].O.C(=O)(O)[O-].[Na+]>CN(C)C=O>[CH3:1][C:2]1[N:7]=[C:6]([C:8]2[C:9]([C:16]3[C:25]4[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=4)[NH:19][C:18](=[O:30])[CH:17]=3)=[C:10]3[CH2:15][CH2:14][CH2:13][N:11]3[N:12]=2)[CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 962WaterHCID 9845Trifluoroacetic anhydrideHCID 516892Sodium BicarbonateHCID 219926474-[2-(6-methyl-pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]-quinoline-1-oxide

Product 1

HCID 99678834-[2-(6-Methyl-pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]-1H-quinolin-2-one

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 4-[2-(6-methyl-pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]-quinoline-1-oxide (103 mg, 0.30 mmol) in N,N-dimethylformamide (3 mL) is added trifluoroacetic anhydride (425 μL, 3.0 mmol). The mixture is stirred for 40 h, poured into water, and the pH adjusted to 8 with saturated aqueous sodium bicarbonate solution. The mixture is extracted three times with ethyl acetate, the combined organic extracts washed three times with water and once with brine, dried (sodium sulfate), filtered, and concentrated in vacuo. The residue is triturated with 10% acetone/90% dichloromethane and filtered. The solid is dried under vacuum to yield the title compound, 11.6 mg (10%), as a yellow solid.

Workup

  1. extractionThe mixture is extracted three times with ethyl acetate
  2. washthe combined organic extracts washed three times with water
  3. dry with materialonce with brine, dried (sodium sulfate)
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue is triturated with 10% acetone/90% dichloromethane
  7. filtrationfiltered
  8. customThe solid is dried under vacuum

Sources & evidence

ORD record
ord-3b0855e547304a38aa947adbcdb4ba35
Source dataset
uspto-grants-2006_08
Patent number
US07087626B2

Linked notes

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