Ammonium Chloride → 2-(3-fluoropyridin-4-yl)-1-methyl-5-trifluoromethyl-1H-benzimidazole

HRID 2390468

Reaktionsgleichung

Reaktionsgleichung von HRID 2390468
[CH3:1][NH:2][C:3]1[C:4]([NH2:13])=[CH:5][C:6]([C:9]([F:12])([F:11])[F:10])=[CH:7][CH:8]=1.[F:14][C:15]1[CH:16]=[N:17][CH:18]=[CH:19][C:20]=1[CH:21]=O.S(=O)(O)[O-].[Na+].[Cl-].[NH4+]>CN(C=O)C>[F:14][C:15]1[CH:16]=[N:17][CH:18]=[CH:19][C:20]=1[C:21]1[N:2]([CH3:1])[C:3]2[CH:8]=[CH:7][C:6]([C:9]([F:10])([F:11])[F:12])=[CH:5][C:4]=2[N:13]=1

Komponenten

6

Edukt 4

HCID 25517Ammonium ChlorideHCID 715666N1-Methyl-4-(trifluoromethyl)benzene-1,2-diamineHCID 27630033-FluoroisonicotinaldehydeHCID 23665763Sodium Bisulfite

Produkt 1

HCID 666115222-(3-fluoropyridin-4-yl)-1-methyl-5-trifluoromethyl-1H-benzimidazoleAusbeute 62 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of 1.90 g of N1-methyl-4-trifluoromethylbenzene-1,2-diamine, 1.49 g of 3-fluoropyridine-4-carbaldehyde, 3.12 g of sodium bisulfite and 20 ml of DMF was stirred for 1.5 hours while heating at 80° C., then, was stirred for 2 hours while heating at 120° C. After cooling down to room temperature, a saturated ammonium chloride aqueous solution was poured, and the mixture was extracted three times with ethyl acetate. The combined organic layers were dried over magnesium sulfate, then, concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to obtain 1.83 g of 2-(3-fluoropyridin-4-yl)-1-methyl-5-trifluoromethyl-1H-benzimidazole (hereinafter, referred to as present active compound 4).

Aufarbeitung

  1. stirringwas stirred for 2 hours
  2. temperaturewhile heating at 120° C
  3. temperatureAfter cooling down to room temperature
  4. extractionthe mixture was extracted three times with ethyl acetate
  5. dry with materialThe combined organic layers were dried over magnesium sulfate
  6. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-322696cc977e4e8d843e9d0710be5298
Quelldatensatz
uspto-grants-2012_09
Patentnummer
US08273764B2

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