Citric Acid → ethyl 7-[methyl(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indole-2-carboxylate

HRID 504744Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 504744
[S:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[S:6]([NH:9][C:10]1[CH:11]=[C:12]([O:24][C:25]([F:28])([F:27])[F:26])[CH:13]=[C:14]2[C:18]=1[NH:17][C:16]([C:19]([O:21][CH2:22][CH3:23])=[O:20])=[CH:15]2)(=[O:8])=[O:7].[C:29](=O)([O-])[O-].[K+].[K+].CI.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>CN(C)C=O>[CH3:29][N:9]([S:6]([C:2]1[S:1][CH:5]=[CH:4][CH:3]=1)(=[O:7])=[O:8])[C:10]1[CH:11]=[C:12]([O:24][C:25]([F:27])([F:28])[F:26])[CH:13]=[C:14]2[C:18]=1[NH:17][C:16]([C:19]([O:21][CH2:22][CH3:23])=[O:20])=[CH:15]2

Komponenten

6

Edukt 4

HCID 311Citric AcidHCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 57476185ethyl 7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indole-2-carboxylate

Produkt 1

HCID 57476184ethyl 7-[methyl(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indole-2-carboxylateAusbeute 66,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

A mixture of ethyl 7-[(2-thienylsulfonyl)amino]-5-(trifluoromethoxy)-1H-indole-2-carboxylate (3.30 g), potassium carbonate (1.05 g) and N,N-dimethylformamide (50 mL) was stirred at 0° C. for 30 min. Methyl iodide (1.08 g) was added to the reaction mixture at 0° C., and the mixture was stirred at room temperature for 15 hr. Aqueous citric acid solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried over magnesium sulfate, and concentrated. The obtained residue was subjected to silica gel column chromatography, and eluted with ethyl acetate-hexane (9:1-3:1, volume ratio) to give the title compound (2.26 g, yield 66%) as colorless crystals. The crystals were recrystallized from ethyl acetate-hexane to give colorless prism crystals. melting point 149-150° C.

Aufarbeitung

  1. stirringthe mixture was stirred at room temperature for 15 hr
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe ethyl acetate layer was washed with saturated brine
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated
  6. washeluted with ethyl acetate-hexane (9:1-3:1, volume ratio)

Quellen und Nachweise

ORD-Eintrag
ord-603da97d9e504af6be0f803032895450
Quelldatensatz
uspto-grants-2010_08
Patentnummer
US07777047B2

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