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1-(6-Chloroimidazo(1,2-b)pyridazin-3-yl)ethan-1-one → 1-(6-Chloroimidazo[1,2-b]pyridazin-3-yl)-1-(6-fluoro-1-methyl-1H-indazol-5-yl)ethanol

HRID 1892368
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1892368
Br[C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][C:10]=1[F:11])[N:7]([CH3:12])[N:6]=[CH:5]2.[Li]CCCC.[Cl:18][C:19]1[CH:20]=[CH:21][C:22]2[N:23]([C:25]([C:28](=[O:30])[CH3:29])=[CH:26][N:27]=2)[N:24]=1>C1COCC1>[Cl:18][C:19]1[CH:20]=[CH:21][C:22]2[N:23]([C:25]([C:28]([C:2]3[CH:3]=[C:4]4[C:8](=[CH:9][C:10]=3[F:11])[N:7]([CH3:12])[N:6]=[CH:5]4)([OH:30])[CH3:29])=[CH:26][N:27]=2)[N:24]=1
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Komponenten

5

Edukt 3

HCID 132488051-(6-Chloroimidazo(1,2-b)pyridazin-3-yl)ethan-1-one2×HCID 579172745-Bromo-6-fluoro-1-methyl-1H-indazole2×HCID 178418339Butyllithium

Produkt 1

HCID 581475401-(6-Chloroimidazo[1,2-b]pyridazin-3-yl)-1-(6-fluoro-1-methyl-1H-indazol-5-yl)ethanolAusbeute 34 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028
Tetrahydrofuran
Lösungsmittel
2×

Reaktionsbedingungen

Temperatur
-100 °C

Versuchsvorschrift

To a solution of 5-bromo-6-fluoro-1-methyl-1H-indazole (intermediate L) (1.800 g, 7.86 mmol) in THF (79 mL) at −100° C. was added n-BuLi (5.40 mL, 8.64 mmol) dropwise. After stirring for 1 h at −100° C., a solution of 1-(6-chloroimidazo[1,2-b]pyridazin-3-yl)ethanone (intermediate M) (1.691 g, 8.64 mmol) in THF (20 mL) was added dropwise. The reaction solution was stirred for additional 2 h and quenched with NH4Cl (aq). The resulting mixture was extracted with EtOAc. The combined organic layers were washed with NH4Cl (aq), dried over Na2SO4 and concentrated in vacuo to afford the crude product which was purified by column chromatography (hexanes:EtOAc) to give the title compound in 34% yield. LCMS (method B): [MH]+=346, tR=2.14 min.

Aufarbeitung

  1. stirringThe reaction solution was stirred for additional 2 h
  2. customquenched with NH4Cl (aq)
  3. extractionThe resulting mixture was extracted with EtOAc
  4. washThe combined organic layers were washed with NH4Cl (aq)
  5. dry with materialdried over Na2SO4
  6. concentrationconcentrated in vacuo
  7. customto afford the crude product which
  8. customwas purified by column chromatography (hexanes:EtOAc)

Quellen und Nachweise

ORD-Eintrag
ord-0e19a0c69b174457bb7d1232b341f144
Quelldatensatz
uspto-grants-2013_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08507676B2

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