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HCID 178525122, Verbindung → 4-[5-(3,4-Dichlorophenyl)-4-pyridin-4-yl-1h-imidazol-2-yl]piperidine

HRID 2287429
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2287429
C(OC([N:11]1[CH2:16][CH2:15][CH:14]([C:17]2[NH:18][C:19]([C:28]3[CH:33]=[CH:32][C:31]([Cl:34])=[C:30]([Cl:35])[CH:29]=3)=[C:20]([C:22]3[CH:27]=[CH:26][N:25]=[CH:24][CH:23]=3)[N:21]=2)[CH2:13][CH2:12]1)=O)C1C=CC=CC=1>Br.C(O)(=O)C>[Cl:35][C:30]1[CH:29]=[C:28]([C:19]2[NH:18][C:17]([CH:14]3[CH2:15][CH2:16][NH:11][CH2:12][CH2:13]3)=[N:21][C:20]=2[C:22]2[CH:23]=[CH:24][N:25]=[CH:26][CH:27]=2)[CH:33]=[CH:32][C:31]=1[Cl:34]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

4

Edukt 1

HCID 178525122HCID 178525122, Verbindung

Produkt 1

HCID 1784779894-[5-(3,4-Dichlorophenyl)-4-pyridin-4-yl-1h-imidazol-2-yl]piperidineAusbeute 78,6 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 176Acetic AcidLösungsmittelHCID 260Hydrogen BromideLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

4-[5-(3,4-Dichlorophenyl)-4-pyridin-4-yl-1H-imidazol-2-yl]piperidine-1-carboxylic acid benzyl ester (3.8 g, 7.5 mmol) dissolved in hydrogen bromide (30 wt. %) in acetic acid (20 mL) was heated to 80° C. for one hour, after which time the reaction mixture was allowed to cool to ambient temperature and concentrated at reduced pressure. The residue was then dissolved in hydrochloric acid (100 mL of 1N) and extracted with ethyl acetate (100 mL). The aqueous layer was then basified with sodium hydroxide (35 mL of 3N) and buffered with saturated aqueous sodium hydrogen carbonate (300 mL). The aqueous layer was extracted with chloroform (5×200 mL) and the organic layers combined, dried over anhydrous sodium sulfate, filtered and concentrated at reduced pressure. The resulting foam was crystallized from ethyl acetate/hexane to give the free amine (2.2 g).

Aufarbeitung

  1. temperatureto cool to ambient temperature
  2. concentrationconcentrated at reduced pressure
  3. dissolutionThe residue was then dissolved in hydrochloric acid (100 mL of 1N)
  4. extractionextracted with ethyl acetate (100 mL)
  5. extractionThe aqueous layer was extracted with chloroform (5×200 mL)
  6. dry with materialdried over anhydrous sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated at reduced pressure
  9. customThe resulting foam was crystallized from ethyl acetate/hexane

Quellen und Nachweise

ORD-Eintrag
ord-13ff7889c41f4caabe1fd9dda976ce25
Quelldatensatz
uspto-grants-2000_07
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06083949

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