Dimethylformamide → methyl 2-(5-bromo-3-cyano-2-oxopyridin-1(2H)-yl)acetate
Reaktionsgleichung
[Br:1][C:2]1[CH:3]=[C:4]([C:9]#[N:10])[C:5](=[O:8])[NH:6][CH:7]=1.C(=O)([O-])[O-].[K+].[K+].Cl[CH2:18][C:19]([O:21][CH3:22])=[O:20].CN(C=O)C>C1COCC1>[Br:1][C:2]1[CH:3]=[C:4]([C:9]#[N:10])[C:5](=[O:8])[N:6]([CH2:18][C:19]([O:21][CH3:22])=[O:20])[CH:7]=1Komponenten
Edukt 4
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 80 °C
Versuchsvorschrift
To 5-bromo-3-cyano-2(1H)-pyridinone (1.4 g, 7.0 mmol) and potassium carbonate (1.9 g, 1.3 mL, 14.1 mmol), THF (26.4 mL) and methyl chloroacetate (1.53 g, 1.2 mL, 14.1 mmol) were added. The reaction was stirred at 80° C. The starting material didn't dissolve well in THF. After 3.5 hours, mainly staring material was observed. DMF (18 mL) was added and the starting material went into solution. The reaction was heated at 80° C. for 45 minutes. The desired mass was observed by LCMS. The reaction was filtered using ethyl acetate and the solvent was evaporated under reduced pressure. The crude product was separated by column chromatography on silica gel (0-100% ethyl acetate in hexane) to yield methyl 2-(5-bromo-3-cyano-2-oxopyridin-1(2H)-yl)acetate as a yellow solid (1.42 g, 74%). ESI-MS m/z calc. 271.07. found 271.3 (M+1)+. Retention time 0.59 minutes.
Aufarbeitung
- temperatureThe reaction was heated at 80° C. for 45 minutes
- filtrationThe reaction was filtered
- customthe solvent was evaporated under reduced pressure
- customThe crude product was separated by column chromatography on silica gel (0-100% ethyl acetate in hexane)
Quellen und Nachweise
- ORD-Eintrag
- ord-a44819bb1a8c4d589dc52742d885c810
- Quelldatensatz
- uspto-grants-2015_03
- Patentnummer
- US08969386B2
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