Potassium Carbonate → Ethyl 2-[2-(2,6-diethyl-4-methylphenylacetyl)-2-methylhydrazono]propanoate

HRID 1890226

Reaktionsgleichung

Reaktionsgleichung von HRID 1890226
[CH3:1][NH:2][N:3]=[C:4]([CH3:10])[C:5]([O:7][CH2:8][CH3:9])=[O:6].C(=O)([O-])[O-].[K+].[K+].[CH2:17]([C:19]1[CH:24]=[C:23]([CH3:25])[CH:22]=[C:21]([CH2:26][CH3:27])[C:20]=1[CH2:28][C:29](Cl)=[O:30])[CH3:18]>C(#N)C>[CH2:17]([C:19]1[CH:24]=[C:23]([CH3:25])[CH:22]=[C:21]([CH2:26][CH3:27])[C:20]=1[CH2:28][C:29]([N:2]([CH3:1])[N:3]=[C:4]([CH3:10])[C:5]([O:7][CH2:8][CH3:9])=[O:6])=[O:30])[CH3:18]

Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 574373202,6-Diethyl-4-methylphenylacetyl chlorideHCID 73828661Ethyl 2-(methylhydrazono)propanoate

Produkt 1

HCID 76550641Ethyl 2-[2-(2,6-diethyl-4-methylphenylacetyl)-2-methylhydrazono]propanoateAusbeute 49,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel2×

Versuchsvorschrift

To a mixture of 2.0 g of ethyl 2-(methylhydrazono)propanoate and 35 mL of acetonitrile, 1.5 g of potassium carbonate was added. To the mixture, a solution of 2.6 g of 2,6-diethyl-4-methylphenylacetyl chloride in 10 mL of acetonitrile was added dropwise over about 20 minutes under ice cooling. This mixture was stirred at room temperature for 3.5 hours. The reaction mixture was concentrated under reduced pressure. To the residue, 20 mL of ice water was added, followed by extraction with ethyl acetate (20 mL×3). The organic layer was washed with an aqueous saturated sodium chloride solution (20 mL×2), dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was subjected to basic alumina column chromatography (ethyl acetate:hexane=1:3) to obtain 1.9 g of ethyl 2-[2-(2,6-diethyl-4-methylphenylacetyl)-2-methylhydrazono]propanoate [compound (VI-2)] as a white crystal.

Aufarbeitung

  1. additionwas added
  2. concentrationThe reaction mixture was concentrated under reduced pressure
  3. additionTo the residue, 20 mL of ice water was added
  4. extractionfollowed by extraction with ethyl acetate (20 mL×3)
  5. washThe organic layer was washed with an aqueous saturated sodium chloride solution (20 mL×2)
  6. dry with materialdried over anhydrous magnesium sulfate
  7. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-64562c397b374f5dbf765357f39b36b2
Quelldatensatz
uspto-grants-2013_08
Patentnummer
US08507410B2

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