Methyl 2-chloro-4-methylpyridine-3-carboxylate → HCID 44191036, Verbindung
Reaktionsgleichung
[CH3:1][O:2][C:3](=[O:12])[C:4]1[C:9]([CH3:10])=[CH:8][CH:7]=[N:6][C:5]=1Cl.[C:13]([Cu])#[N:14]>CN1C(=O)CCC1.O.Cl>[CH3:1][O:2][C:3](=[O:12])[C:4]1[C:9]([CH3:10])=[CH:8][CH:7]=[N:6][C:5]=1[C:13]#[N:14]Komponenten
6
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 3
Reaktionsbedingungen
- Temperatur
- 180 °C
Versuchsvorschrift
A suspension of 2-chloro-4-methyl-nicotinic acid methyl ester (2.64 g, 14.3 mmol) and CuCN (6.4 g, 71 mmol) in NMP (5.3 mL) was heated to 180° C. for 30 min. The reaction mixture was then cooled to room temperature and diluted with water (80 mL). After vigorous stirring for 16 h, the suspension was centrifuged and the precipitate suspended in a solution of FeCl3.6H2O (5.8 g, 21 mmol) in aqueous HCl (4 M, 80 mL). After vigorous stirring for 1 h, the suspension was extracted with DCM (3×70 mL). The organic layer was dried over Na2SO4/Na2CO3, filtered, and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (elution with EA/DCM 1:10) to give the title compound. MS (m/z): 177.0 [M+H+].
Aufarbeitung
- temperatureThe reaction mixture was then cooled to room temperature
- stirringAfter vigorous stirring for 1 h
- extractionthe suspension was extracted with DCM (3×70 mL)
- dry with materialThe organic layer was dried over Na2SO4/Na2CO3
- filtrationfiltered
- concentrationconcentrated in vacuo
- customThe residue was purified by flash chromatography on silica gel (elution with EA/DCM 1:10)
Quellen und Nachweise
- ORD-Eintrag
- ord-6a78b9ce9b50444dbcef6d6cb0eafb9d
- Quelldatensatz
- uspto-grants-2013_04
- Patentnummer
- US08410134B2
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