Potassium Carbonate → 3-Methyl-1-(3-(tetrahydrofuran-2-yl)pyridin-2-yl)-1H-pyrazole-4-carbaldehyde
Reaktionsgleichung
F[C:2]1[C:7]([CH:8]2[CH2:12][CH2:11][CH2:10][O:9]2)=[CH:6][CH:5]=[CH:4][N:3]=1.[CH3:13][C:14]1[C:18]([CH:19]=[O:20])=[CH:17][NH:16][N:15]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.O>[CH3:13][C:14]1[C:18]([CH:19]=[O:20])=[CH:17][N:16]([C:2]2[C:7]([CH:8]3[CH2:12][CH2:11][CH2:10][O:9]3)=[CH:6][CH:5]=[CH:4][N:3]=2)[N:15]=1Komponenten
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 2
Reaktionsbedingungen
- Temperatur
- 110 °C
Versuchsvorschrift
To a screw-cap test tube containing 2-fluoro-3-(tetrahydrofuran-2-yl)pyridine (148 mg, 0.88 mmol) in dimethylformamide (2.2 mL) are added 3-methyl-1H-pyrazole-4-carbaldehyde (81 mg, 0.74 mmol) and potassium carbonate (152 mg, 1.1 mmol). The reaction tube is quickly sealed (caution: build-up of pressure possible; use a safety shield) and stirred in a preheated oil bath at 110° C. for 18 h with the aid of a magnetic stirrer. The mixture is diluted with water and extracted with ethyl acetate. The organic layer is separated, dried over magnesium sulfate, filtered and the solvent evaporated in vacuo. The resulting residue is purified by silica gel using normal phase Isco chromatography eluting with hexane: acetone (gradient from 5 to 20% in acetone) to give 116 mg of the title compound. MS (m/z): 258 (M+1).
Aufarbeitung
- customThe reaction tube is quickly sealed (caution
- extractionextracted with ethyl acetate
- customThe organic layer is separated
- dry with materialdried over magnesium sulfate
- filtrationfiltered
- customthe solvent evaporated in vacuo
- customThe resulting residue is purified by silica gel using normal phase Isco chromatography
- washeluting with hexane
Quellen und Nachweise
- ORD-Eintrag
- ord-dbde9c40725e4f1aad3eccee8b174161
- Quelldatensatz
- uspto-grants-2012_07
- Patentnummer
- US08232289B2
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