Acetic Acid → 1-(2-Fluoro-5-iodophenyl)-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one

HRID 1624821Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1624821
[C:1]([C:4]1[C:9](=[O:10])[C:8]([O:11][CH3:12])=[CH:7][N:6]([C:13]2[CH:18]=[C:17]([I:19])[CH:16]=[CH:15][C:14]=2[F:20])[N:5]=1)(=O)[CH3:2].[CH3:21]C(O)=O.[C:25]1([NH:31][NH2:32])[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1>COC(OC)N(C)C>[F:20][C:14]1[CH:15]=[CH:16][C:17]([I:19])=[CH:18][C:13]=1[N:6]1[CH:7]=[C:8]([O:11][CH3:12])[C:9](=[O:10])[C:4]([C:1]2[N:31]([C:25]3[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=3)[N:32]=[CH:21][CH:2]=2)=[N:5]1

Komponenten

5

Edukt 3

HCID 176Acetic AcidHCID 7516PhenylhydrazineHCID 594361593-Acetyl-1-(2-fluoro-5-iodophenyl)-5-methoxypyridazin-4(1H)-one

Produkt 1

HCID 580722081-(2-Fluoro-5-iodophenyl)-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-oneAusbeute 60 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 78373Dimethylformamide dimethyl acetalLösungsmittel

Versuchsvorschrift

A mixture of 3-acetyl-1-(2-fluoro-5-iodophenyl)-5-methoxypyridazin-4(1H)-one (3.88 g, 10.0 mmol) in N,N-dimethylformamide dimethyl acetal (38.8 mL) was heated to reflux for 3 h. The mixture was concentrated in vacuo. To the residue were added AcOH (38.8 mL) and phenylhydrazine (1.97 mL, 20.0 mmol). The mixture was heated to reflux for 5 h. The mixture was concentrated in vacuo, diluted with 1 M HCl aqueous solution, extracted with AcOEt, washed with saturated NaHCO3 aqueous solution, dried over Na2SO4, filtered, concentrated in vacuo, purified by column chromatography on basic silica gel (hexane/AcOEt=50/50 to 0/100) and triturated with AcOEt/hexane to yield the title compound (2.95 g, 60% yield) as a yellow solid: 1H NMR (DMSO-d6, 300 MHz): δ ppm 3.77 (3H, s), 6.99 (1H, d, J=1.5 Hz), 7.23-7.50 (7H, m), 7.79 (1H, d, J=1.9 Hz), 7.84 (1H, ddd, J=8.7, 4.5, 2.3 Hz), 8.49 (1H, d, J=2.6 Hz).

Aufarbeitung

  1. temperaturewas heated
  2. temperatureto reflux for 3 h
  3. concentrationThe mixture was concentrated in vacuo
  4. temperatureThe mixture was heated
  5. temperatureto reflux for 5 h
  6. concentrationThe mixture was concentrated in vacuo
  7. additiondiluted with 1 M HCl aqueous solution
  8. extractionextracted with AcOEt
  9. washwashed with saturated NaHCO3 aqueous solution
  10. dry with materialdried over Na2SO4
  11. filtrationfiltered
  12. concentrationconcentrated in vacuo
  13. custompurified by column chromatography on basic silica gel (hexane/AcOEt=50/50 to 0/100)
  14. customtriturated with AcOEt/hexane

Quellen und Nachweise

ORD-Eintrag
ord-4d3375213fdc4971b0ad496a15db19f3
Quelldatensatz
uspto-grants-2014_07
Patentnummer
US08778944B2

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