Hydrochloric Acid → 1-[4-(aminosulfonyl)phenyl]-5-(4-chlorophenyl)-1H-pyrazole-3-carboxylic acid

HRID 1057787Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1057787
[NH2:1][S:2]([C:5]1[CH:10]=[CH:9][C:8]([N:11]2[C:15]([C:16]3[CH:21]=[CH:20][C:19]([Cl:22])=[CH:18][CH:17]=3)=[CH:14][C:13]([C:23]([O:25]C)=[O:24])=[N:12]2)=[CH:7][CH:6]=1)(=[O:4])=[O:3].O1CCCC1.[OH-].[Na+].Cl>O>[NH2:1][S:2]([C:5]1[CH:10]=[CH:9][C:8]([N:11]2[C:15]([C:16]3[CH:21]=[CH:20][C:19]([Cl:22])=[CH:18][CH:17]=3)=[CH:14][C:13]([C:23]([OH:25])=[O:24])=[N:12]2)=[CH:7][CH:6]=1)(=[O:4])=[O:3]

Komponenten

6

Edukt 4

HCID 313Hydrochloric AcidHCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 3289819methyl 1-[4-(aminosulfonyl)phenyl]-5-(4-chlorophenyl)-1H-pyrazole-3-carboxylate

Produkt 1

HCID 14772451-[4-(aminosulfonyl)phenyl]-5-(4-chlorophenyl)-1H-pyrazole-3-carboxylic acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

Methyl 1-(4-aminosulfonylphenyl)-5-(4-chlorophenyl)-1H-pyrazole-3-carboxylate from Step 2 (1.0 g, 2.66 mmol) was added to tetrahydrofuran (20 mL). Aqueous sodium hydroxide (2.5 N, 2.7 mL) and water (2.5 mL) were added, and the suspension was heated to reflux and held for 16 hours. The solids dissolved during this time. The reaction was cooled to room temperature, and hydrochloric acid solution (1 N, 11 mL) was added. The aqueous suspension was extracted with methylene chloride (2×20 mL). The combined organic solution was dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo to an oil. Trituration with 30 mL of dichloromethane yielded, upon filtration and drying, 1-(4-aminosulfonylphenyl)-5-(4-chlorophenyl)-1H-pyrazole-3-carboxylic acid (0.90 g (94%)) as a white solid: mp 126-128° C.

Aufarbeitung

  1. temperaturethe suspension was heated
  2. temperatureto reflux
  3. dissolutionThe solids dissolved during this time
  4. extractionThe aqueous suspension was extracted with methylene chloride (2×20 mL)
  5. dry with materialThe combined organic solution was dried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo to an oil
  8. customTrituration with 30 mL of dichloromethane yielded, upon filtration
  9. customdrying

Quellen und Nachweise

ORD-Eintrag
ord-a999c0ad6f43450b972499bfd8c1fb30
Quelldatensatz
uspto-grants-2003_02
Patentnummer
US06515014B2

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