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Iodoethane → 2-[9-Chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]butanenitrile

HRID 1399076
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1399076
[CH3:1][C:2](C)([O-])C.[K+].[Cl:7][C:8]1[C:16]2[N:15]=[C:14]3[N:17]([C:21]4[CH:26]=[CH:25][C:24]([Cl:27])=[CH:23][C:22]=4[Cl:28])[CH2:18][CH2:19][CH2:20][N:13]3[C:12]=2[C:11]([CH2:29][C:30]#[N:31])=[CH:10][CH:9]=1.C(I)C>O1CCCC1.[Cl-].[NH4+]>[Cl:7][C:8]1[C:16]2[N:15]=[C:14]3[N:17]([C:21]4[CH:26]=[CH:25][C:24]([Cl:27])=[CH:23][C:22]=4[Cl:28])[CH2:18][CH2:19][CH2:20][N:13]3[C:12]=2[C:11]([CH:29]([CH2:1][CH3:2])[C:30]#[N:31])=[CH:10][CH:9]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 6340IodoethaneHCID 23665647Potassium tert-butoxideHCID 57785849[9-Chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]acetonitrile

Produkt 1

HCID 577863132-[9-Chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]butanenitrileAusbeute 38 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028
Tetrahydrofuran
Lösungsmittel
HCID 25517Ammonium ChlorideLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

Potassium t-butoxide (315 mg, 2.81 mmol) was added to a stirred solution of [9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]acetonitrile (500 mg, 1.28 mmol) and ethyl iodide (499 mg, 3.20 mmol) in tetrahydrofuran (13 mL) at 0° C., and the mixture was stirred at 0° C. for 1 hr. The mixture was diluted with aqueous saturated ammonium chloride, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 20-50% ethyl acetate/n-hexane gradient mixture. The filtrate was concentrated in vacuo to give the solid, which was recrystallized from ethanol/ethyl acetate to give the title compound as a colorless crystal (202 mg, 0.481 mmol, 38%).

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. washThe combined organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by flash column chromatography on silica gel eluting with a 20-50% ethyl acetate/n-hexane gradient mixture
  7. concentrationThe filtrate was concentrated in vacuo
  8. customto give the solid, which
  9. customwas recrystallized from ethanol/ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-98058e9b09614dc5aac6450f5081b512
Quelldatensatz
uspto-grants-2014_12
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08901141B2

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