Acetic Acid → 3-Methyl-2,6-piperidinedione

HRID 2189906

Reaktionsgleichung

Reaktionsgleichung von HRID 2189906
OS(O)(=O)=O.[C:6]([OH:9])(=O)[CH3:7].[CH3:10][CH:11]([CH2:14]CC#N)[C:12]#[N:13].C([O-])([O-])=[O:19].[Na+].[Na+]>O>[CH3:10][CH:11]1[CH2:14][CH2:7][C:6](=[O:9])[NH:13][C:12]1=[O:19]

Komponenten

6

Edukt 4

HCID 176Acetic Acid2×HCID 1118Sulfuric AcidHCID 10340Sodium CarbonateHCID 206862-Methylpentanedinitrile

Produkt 1

HCID 346293-Methyl-2,6-piperidinedioneAusbeute 67 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Reaktionsbedingungen

Temperatur
130 °C

Versuchsvorschrift

A solution of H2SO4 (80 ml), acetic acid (500 ml) and 2-methylpentanedinitrile (128.0 g, 1184 mmol) was stirred at room temperature. An aqueous solution of acetic acid (100 ml in 32 ml water) was then added dropwise. Upon completion of the addition, the reaction was heated to 130° C. for 1 hour. The reaction was then allowed to cool to room temperature and filtered to remove solids, which were washed with acetic acid (100 ml). The filtrate was then concentrated until a residue resulted. This residue was poured into water (0.75 l), and adjusted to pH 5 with Na2CO3. The resulting solid was collected by filtration and washed with cold water to give the title compound (101 g, 67%) which was used without further purification.

Aufarbeitung

  1. additionUpon completion of the addition
  2. temperatureto cool to room temperature
  3. filtrationfiltered
  4. customto remove solids, which
  5. washwere washed with acetic acid (100 ml)
  6. concentrationThe filtrate was then concentrated until a residue
  7. customresulted
  8. filtrationThe resulting solid was collected by filtration
  9. washwashed with cold water

Quellen und Nachweise

ORD-Eintrag
ord-262bfbe611734fbe9d1f289a777c9bf1
Quelldatensatz
uspto-grants-2012_12
Patentnummer
US08324252B2

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