Water → 2-methyl-3-oxo-N-phenethyl-butyramide

HRID 1725567Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1725567
[CH3:1][C:2]1([CH:7]([CH3:19])[C:8]([NH:10][CH2:11][CH2:12][C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)=[O:9])OCC[O:3]1.O.C1(C)C=CC(S(O)(=O)=O)=CC=1.O.C(=O)([O-])[O-].[Na+].[Na+]>CC(C)=O>[CH3:19][CH:7]([C:2](=[O:3])[CH3:1])[C:8]([NH:10][CH2:11][CH2:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)=[O:9]

Komponenten

6

Edukt 4

HCID 962WaterHCID 10340Sodium CarbonateHCID 521998p-Toluenesulfonic acid monohydrateHCID 58921891HCID 58921891, Verbindung

Produkt 1

HCID 119843462-methyl-3-oxo-N-phenethyl-butyramideAusbeute 52 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Versuchsvorschrift

2-(2-Methyl-[1,3]dioxolan-2-yl)-N-phenethyl-propionamide of Example 1c (0.40 g, 1.5 mmol) was added to p-toluenesulfonic acid monohydrate (0.48 g, 2.5 mmol) in water (20 mmol) under a nitrogen atmosphere at room temperature. Acetone (20 mL) was added, and the reaction mixture was stirred overnight at room temperature and then heated at 95° C. for 3 h. After cooling to room temperature, the solution was made basic with sodium carbonate (0.5 g). The acetone was removed at room temperature under vacuum and the remaining aqueous material was extracted with dichloromethane (50 mL). The organic layer was washed with water (50 mL), brine (50 mL) and then dried with sodium sulfate. After concentration, the product was purified by crystallization from hexanes-ethyl acetate (1:1) to give 2-methyl-3-oxo-N-phenethyl-butyramide (0.17 g, 52%) as a white solid.

Aufarbeitung

  1. temperatureheated at 95° C. for 3 h
  2. temperatureAfter cooling to room temperature
  3. customThe acetone was removed at room temperature under vacuum
  4. extractionthe remaining aqueous material was extracted with dichloromethane (50 mL)
  5. washThe organic layer was washed with water (50 mL), brine (50 mL)
  6. dry with materialdried with sodium sulfate
  7. concentrationAfter concentration
  8. customthe product was purified by crystallization from hexanes-ethyl acetate (1:1)

Quellen und Nachweise

ORD-Eintrag
ord-6ef57c5c0c9446d1998d0127978d4ee3
Quelldatensatz
uspto-grants-2009_02
Patentnummer
US07491728B2

Notizen zur Reaktion

Wird geladen…