Formaldehyde → Methyl 2-[3-chloro-6-(methoxy)-1,5-naphthyridin-4-yl]-2-propenoate

HRID 15124

Reaktionsgleichung

Reaktionsgleichung von HRID 15124
[Cl:1][C:2]1[CH:3]=[N:4][C:5]2[C:10]([C:11]=1[CH2:12][C:13]([O:15][CH3:16])=[O:14])=[N:9][C:8]([O:17][CH3:18])=[CH:7][CH:6]=2.[C:19](=O)([O-])[O-].[K+].[K+].C=O.C(OCC)(=O)C>C1CCCCC1.[Cl-].C([N+](CC)(CC)CC)C1C=CC=CC=1.O>[Cl:1][C:2]1[CH:3]=[N:4][C:5]2[C:10]([C:11]=1[C:12](=[CH2:19])[C:13]([O:15][CH3:16])=[O:14])=[N:9][C:8]([O:17][CH3:18])=[CH:7][CH:6]=2

Komponenten

8

Edukt 4

HCID 712FormaldehydeHCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 57707490Methyl [3-chloro-6-(methyloxy)-[1,5]naphthyridin-4-yl]acetate

Produkt 1

HCID 57486868Methyl 2-[3-chloro-6-(methoxy)-1,5-naphthyridin-4-yl]-2-propenoateAusbeute 89 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 66133Benzyl triethylammonium chlorideKatalysatorHCID 962WaterLösungsmittelHCID 8078CyclohexaneLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To a solution of methyl [3-chloro-6-(methyloxy)-1,5-naphthyridin-4-yl]acetate (43 g, 162 mmol) in cyclohexane (1060 ml) was added benzyltriethylammonium chloride (71.2 g, 313 mmol), potassium carbonate (42 g, 304 mmol) and paraformaldehyde (42 g). The reaction mixture was then heated at 80° C. for 24 hours, cooled and treated with ethyl acetate and water. The aqueous was extracted with ethyl acetate. The combined organic phases were dried and the solvent was removed under reduced pressure. The residue was subjected to column chromatography on silica gel using a hexane and ethyl acetate gradient to provide the desired compound (40 g, 89%).

Aufarbeitung

  1. temperaturecooled
  2. extractionThe aqueous was extracted with ethyl acetate
  3. customThe combined organic phases were dried
  4. customthe solvent was removed under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-6b4e56ec1d8f4d4cac9a4ee473daecdc
Quelldatensatz
uspto-grants-2010_06
Patentnummer
US07732460B2

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