Water → 6-(2-chloropyridin-4-yl)-7-(4-fluorophenyl)-5H-pyrrolo[2,3-b]pyrazine

HRID 1017675

Reaktionsgleichung

Reaktionsgleichung von HRID 1017675
[NH:1]([C:3]1[CH:8]=[N:7][CH:6]=[CH:5][N:4]=1)N.[Cl:9][C:10]1[CH:15]=[C:14]([C:16](=O)[CH2:17][C:18]2[CH:23]=[CH:22][C:21]([F:24])=[CH:20][CH:19]=2)[CH:13]=[CH:12][N:11]=1.O.C1(C)C=CC(S(O)(=O)=O)=CC=1.O>C1C=CC=CC=1>[Cl:9][C:10]1[CH:15]=[C:14]([C:16]2[NH:1][C:3]3=[N:4][CH:5]=[CH:6][N:7]=[C:8]3[C:17]=2[C:18]2[CH:19]=[CH:20][C:21]([F:24])=[CH:22][CH:23]=2)[CH:13]=[CH:12][N:11]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 521998p-Toluenesulfonic acid monohydrateHCID 14878232-HydrazinopyrazineHCID 229879691-(2-Chloropyridin-4-yl)-2-(4-fluorophenyl)ethanone

Produkt 1

HCID 229879776-(2-chloropyridin-4-yl)-7-(4-fluorophenyl)-5H-pyrrolo[2,3-b]pyrazineAusbeute 26,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 241BenzeneLösungsmittel

Versuchsvorschrift

Hydrazinopyrazine (6.2 g, 57 mmol) and 1-(2-chloropyridin-4-yl)-2-(4-fluorophenyl)ethanone (14 g, 57 mmol) were suspended in benzene (250 ml) and p-toluenesulfonic acid monohydrate (0.68 g) was added. The reaction mixture was then refluxed with azeotropic removal of water via Dean Stark trap. After 2 h, the benzene was removed in vacuo and di-ethylene glycol was added. The reaction mixture was heated at reflux. After 2 h, the reaction mixture was poured into ether with vigorous stirring. Water was added and the product was extracted into ether. The organic layer was dried over magnesium sulfate, filtered and concentrated in vacuo. Methanol was added and the solid was filtered off to give 6-(2-chloropyridin-4-yl)-7-(4-fluorophenyl)-5H-pyrrolo[2,3-b]pyrazine (4.9 g) as a solid.

Aufarbeitung

  1. customthe benzene was removed in vacuo and di-ethylene glycol
  2. additionwas added
  3. temperatureThe reaction mixture was heated
  4. temperatureat reflux
  5. waitAfter 2 h
  6. additionthe reaction mixture was poured into ether with vigorous stirring
  7. additionWater was added
  8. extractionthe product was extracted into ether
  9. dry with materialThe organic layer was dried over magnesium sulfate
  10. filtrationfiltered
  11. concentrationconcentrated in vacuo
  12. additionMethanol was added
  13. filtrationthe solid was filtered off

Quellen und Nachweise

ORD-Eintrag
ord-f2c2cb694ddb4188afb035856b0d0938
Quelldatensatz
uspto-grants-2002_11
Patentnummer
US06479507B2

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