Picolinic acid → Diethyl 2-(2-methylquinolin-7-yl)malonate

HRID 339075Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 339075
Br[C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[CH:7][C:8]([CH3:12])=[N:9]2)=[CH:4][CH:3]=1.N1C=CC=CC=1C(O)=O.C([O-])([O-])=O.[Cs+].[Cs+].[C:28]([O:36][CH2:37][CH3:38])(=[O:35])[CH2:29][C:30]([O:32][CH2:33][CH3:34])=[O:31]>O1CCOCC1.O.C(OCC)(=O)C>[CH3:12][C:8]1[CH:7]=[CH:6][C:5]2[C:10](=[CH:11][C:2]([CH:29]([C:30]([O:32][CH2:33][CH3:34])=[O:31])[C:28]([O:36][CH2:37][CH3:38])=[O:35])=[CH:3][CH:4]=2)[N:9]=1

Komponenten

8

Edukt 4

HCID 1018Picolinic acidHCID 7761Diethyl MalonateHCID 10796Cesium carbonateHCID 123328967-Bromo-2-methylquinoline

Produkt 1

HCID 70984111Diethyl 2-(2-methylquinolin-7-yl)malonateAusbeute 26 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 962WaterLösungsmittelHCID 8857Ethyl AcetateLösungsmittelHCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

A mixture of 7-bromo-2-methylquinoline (2.00 g, 9.01 mmol), Cu(I)I (0.172 g, 0.90 mmol), picolinic acid (0.222 g, 1.80 mmol), Cs2CO3 (8.80 g, 27.0 mmol) and diethyl malonate (2.73 mL, 18.0 mmol) in dioxane (25 mL) was stirred at 100° C. for hours. After cooling to ambient temperature, ethyl acetate (30 mL) and water (15 mL) were added. The organic layer was separated, washed with brine, dried (sodium sulfate), filtered and concentrated under reduced pressure. The residue obtained was purified by flash chromatography on silica gel (3:2 hexane/ethyl acetate) to give diethyl 2-(2-methylquinolin-7-yl)malonate (0.7 g, 2.32 mmol, 26% yield) as oil.

Aufarbeitung

  1. temperatureAfter cooling to ambient temperature
  2. customThe organic layer was separated
  3. washwashed with brine
  4. dry with materialdried (sodium sulfate)
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue obtained
  8. customwas purified by flash chromatography on silica gel (3:2 hexane/ethyl acetate)

Quellen und Nachweise

ORD-Eintrag
ord-f254e49f4fea4f2aa859f138dfbcc5e9
Quelldatensatz
uspto-grants-2014_11
Patentnummer
US08889704B2

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