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Pyridine → (Z)-1-[9-chloro-1-(2,4-dichlorophenyl)-3,4-dihydro-2H-pyrimido[1,2-a]benzimidazol-6-yl]-N-methoxypropan-1-imine

HRID 1628702
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1628702
[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=4[Cl:22])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([C:23](=O)[CH2:24][CH3:25])=[CH:4][CH:3]=1.Cl.[CH3:28][O:29][NH2:30].N1C=CC=CC=1>C(O)C>[CH3:28][O:29]/[N:30]=[C:23](\[C:5]1[C:6]2[N:7]3[CH2:14][CH2:13][CH2:12][N:11]([C:15]4[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=4[Cl:22])[C:8]3=[N:9][C:10]=2[C:2]([Cl:1])=[CH:3][CH:4]=1)/[CH2:24][CH3:25]
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Komponenten

5

Edukt 3

HCID 1049PyridineHCID 521874O-Methylhydroxylamine hydrochlorideHCID 577863001-[9-Chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-one

Produkt 1

HCID 57785895(Z)-1-[9-chloro-1-(2,4-dichlorophenyl)-3,4-dihydro-2H-pyrimido[1,2-a]benzimidazol-6-yl]-N-methoxypropan-1-imine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702
Ethanol
Lösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of 1-[9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-one (630 mg, 1.54 mmol), O-methylhydroxylamine hydrochloride (386 mg, 4.62 mmol) and pyridine (3.9 mL) in ethanol (16 mL) was stirred at 80° C. for 26 hr. The mixture was concentrated in vacuo, diluted with saturated aqueous sodium hydrogen carbonate, 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 20-40% 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 compounds as a colorless crystal respectively (E (Example 121): 266 mg, 0.608 mmol, 39%, Z (Example 122): 159 mg, 0.363 mmol, 24%).

Aufarbeitung

  1. concentrationThe mixture was concentrated in vacuo
  2. additiondiluted with saturated aqueous sodium hydrogen carbonate
  3. extractionextracted with ethyl acetate
  4. washThe combined organic layer was washed with brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by flash column chromatography on silica gel eluting with a 20-40% ethyl acetate/n-hexane gradient mixture
  9. concentrationThe filtrate was concentrated in vacuo
  10. customto give the solid, which
  11. customwas recrystallized from ethanol/ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-abd11bacda204633b84024744ee92457
Quelldatensatz
uspto-grants-2014_07
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08785460B2

Notizen zur Reaktion

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