Iodine → 2-(5,6-Dichloro-1H-benzoimidazol-2-yl)-1,1,1-trifluoro-cis-pent-3-en-2-ol

HRID 2080620

Reaktionsgleichung

Reaktionsgleichung von HRID 2080620
[Cl:1][C:2]1[C:16]([Cl:17])=[CH:15][C:5]2[NH:6][C:7]([C:9](=[O:14])[C:10]([F:13])([F:12])[F:11])=[N:8][C:4]=2[CH:3]=1.Br/[CH:19]=[CH:20]\[CH3:21].II.[Mg]>C1COCC1.C(Cl)Cl>[Cl:17][C:16]1[C:2]([Cl:1])=[CH:3][C:4]2[NH:8][C:7]([C:9]([OH:14])(/[CH:19]=[CH:20]\[CH3:21])[C:10]([F:13])([F:11])[F:12])=[N:6][C:5]=2[CH:15]=1

Komponenten

7

Edukt 4

HCID 807IodineHCID 643834cis-1-Bromo-1-propeneHCID 5462224MagnesiumHCID 115943701-(5,6-dichloro-1H-benzoimidazol-2-yl)-2,2,2-trifluoro-ethanone

Produkt 1

HCID 444431042-(5,6-Dichloro-1H-benzoimidazol-2-yl)-1,1,1-trifluoro-cis-pent-3-en-2-ol

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6344DichloromethaneLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

To 1-(5,6-dichloro-1H-benzoimidazol-2-yl)-2,2,2-trifluoro-ethanone (510 mg) in THF (5 mL) at 0° C. was added Grignard reagent, which was freshly prepared from cis-1-bromo-1-propene (1.07 mL), a small iodine flake, and magnesium powder (306 mg) in THF (5 mL). The resulting mixture was then stirred at room temperature for 3 hr. The reaction was quenched with NH4Cl (sat. aq), filtered through a pad of Celite®, rinsed with EtOAc, the layers were separated, the aqueous layer extracted with EtOAc, dried over Na2SO4, filtered, and concentrated to yield a residue. The residue was purified by flash chromatography with Biotage 40s+ column and elution with 10%-40% EtOAc/hexanes to yield a yellow solid. The yellow solid was dissolved in a minimal amount of CH2Cl2 and triturated with hexanes to yield the title compound as a yellow solid.

Aufarbeitung

  1. customThe reaction was quenched with NH4Cl (sat. aq)
  2. filtrationfiltered through a pad of Celite®
  3. washrinsed with EtOAc
  4. customthe layers were separated
  5. extractionthe aqueous layer extracted with EtOAc
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customto yield a residue
  10. customThe residue was purified by flash chromatography with Biotage 40s+ column and elution with 10%-40% EtOAc/hexanes
  11. customto yield a yellow solid
  12. customtriturated with hexanes

Quellen und Nachweise

ORD-Eintrag
ord-f5703adfef8e4f9c9d7d7acde4aa6d5c
Quelldatensatz
uspto-grants-2011_04
Patentnummer
US07932399B2

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