Sulfuric Acid → 3-bromo-N-(4-chloro-2-(1-cyclopropylethylcarbamoyl)phenyl)-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxamide

HRID 448820

Reaktionsgleichung

Reaktionsgleichung von HRID 448820
[O-]S(OOS([O-])(=O)=O)(=O)=O.[K+].[K+].S(=O)(=O)(O)O.CN(C)C=O.[Br:23][C:24]1[CH2:28][CH:27]([C:29]([NH:31][C:32]2[CH:37]=[CH:36][C:35]([Cl:38])=[CH:34][C:33]=2[C:39](=[O:46])[NH:40][CH:41]([CH:43]2[CH2:45][CH2:44]2)[CH3:42])=[O:30])[N:26]([C:47]2[C:52]([Cl:53])=[CH:51][CH:50]=[CH:49][N:48]=2)[N:25]=1>C(OCC)(=O)C.O>[Br:23][C:24]1[CH:28]=[C:27]([C:29]([NH:31][C:32]2[CH:37]=[CH:36][C:35]([Cl:38])=[CH:34][C:33]=2[C:39](=[O:46])[NH:40][CH:41]([CH:43]2[CH2:45][CH2:44]2)[CH3:42])=[O:30])[N:26]([C:47]2[C:52]([Cl:53])=[CH:51][CH:50]=[CH:49][N:48]=2)[N:25]=1

Komponenten

7

Edukt 4

HCID 1118Sulfuric AcidHCID 6228DimethylformamideHCID 24412Potassium PersulfateHCID 441856063-bromo-N-(4-chloro-2-(1-cyclopropylethylcarbamoyl)phenyl)-1-(3-chloropyridin-2-yl)-4,5-dihydro-1H-pyrazole-5-carboxamide

Produkt 1

HCID 667361933-bromo-N-(4-chloro-2-(1-cyclopropylethylcarbamoyl)phenyl)-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxamideAusbeute 90,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

0.24 g of potassium peroxodisulfate and 0.02 g of sulfuric acid were added to 3 ml of an N,N-dimethylformamide solution containing 0.10 g of 3-bromo-N-(4-chloro-2-(1-cyclopropylethylcarbamoyl)phenyl)-1-(3-chloropyridin-2-yl)-4,5-dihydro-1H-pyrazole-5-carboxamide, followed by heating and refluxing. After 1.5 hours, the reaction liquid was left to cool and introduced into 10 ml of water, and then ethyl acetate was added, followed by extraction. The organic layer (the ethyl acetate layer) was washed with a saturated sodium chloride aqueous solution, and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=1/0 to 1/2) to obtain 0.09 g of the desired product (melting point: 231-233° C.).

Aufarbeitung

  1. temperatureby heating
  2. temperaturerefluxing
  3. customthe reaction liquid
  4. waitwas left
  5. temperatureto cool
  6. extractionfollowed by extraction
  7. washThe organic layer (the ethyl acetate layer) was washed with a saturated sodium chloride aqueous solution
  8. dry with materialdried over anhydrous sodium sulfate
  9. distillationThe solvent was distilled off under reduced pressure
  10. customthe residue was purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=1/0 to 1/2)

Quellen und Nachweise

ORD-Eintrag
ord-5b2021305ef24e90aa308a488e79064a
Quelldatensatz
uspto-grants-2013_07
Patentnummer
US08481744B2

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