1-(5,6-dichloro-1H-benzoimidazol-2-yl)-2,2,2-trifluoro-ethanone → 2-(5,6-Dichloro-1H-benzoimidazol-2-yl)-1,1,1-trifluoro-pent-3-yn-2-ol

HRID 2405050

Reaktionsgleichung

[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.[C:18]([Mg]Br)#[C:19][CH3:20]>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])([C:18]#[C:19][CH3:20])[C:10]([F:13])([F:11])[F:12])=[N:6][C:5]=2[CH:15]=1

Komponenten

Reaktionsbedingungen

Temperatur: 0 °C

Versuchsvorschrift

To 1-(5,6-dichloro-1H-benzoimidazol-2-yl)-2,2,2-trifluoro-ethanone (535 mg) in THF (10 mL) at −78° C. was added 1-propynyl magnesium bromide (8 mL of 0.5 M in THF) dropwise. The resulting mixture was then stirred at 0° C. for 3 hr. The reaction was quenched with H2O and 1 N HCl, extracted with EtOAc, dried over Na2SO4, filtered, and concentrated to yield a resisdue. 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 white solid.

Aufarbeitung

customThe reaction was quenched with H2O and 1 N HCl
extractionextracted with EtOAc
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated
customto yield a resisdue
customThe residue was purified by flash chromatography with Biotage 40s+ column and elution with 10%-40% EtOAc/hexanes
customto yield a yellow solid
customtriturated with hexanes

Quellen und Nachweise

ORD-Eintrag: ord-bfb0c15fcf1d4e26bda8144db3ba87af
Quelldatensatz: uspto-grants-2014_08
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08802865B2

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