Succinic anhydride → N-(3-Carboxypropanoyl)-N-methyl-glycine Benzyl Ester

HRID 1716

Reaktionsgleichung

Reaktionsgleichung von HRID 1716
[CH2:1]([O:8][C:9](=[O:13])[CH2:10][NH:11][CH3:12])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:14]1(=[O:20])[O:19][C:17](=[O:18])[CH2:16][CH2:15]1>C1(C)C=CC=CC=1>[CH2:1]([O:8][C:9](=[O:13])[CH2:10][N:11]([C:14](=[O:20])[CH2:15][CH2:16][C:17]([OH:19])=[O:18])[CH3:12])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

4

Edukt 2

HCID 7922Succinic anhydrideHCID 7019103Benzyl 2-(methylamino)acetate

Produkt 1

HCID 19356295N-(3-Carboxypropanoyl)-N-methyl-glycine Benzyl EsterAusbeute 86,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

A mixture of sarcosine benzyl ester (3.0 g, 30.7 mmol) and succinic anhydride (5.5 g, 30.7 mmol) in toluene (75 mL) was heated to reflux for 3 h, cooled, filtered, and the filtrate was concentrated. The residue was taken up in 5% aqueous sodium carbonate and extracted with ethyl acetate. The aqueous phase was adjusted to pH 3 with concentrated hydrochloric using Congo Red paper and extracted with ethyl acetate. The organic phase was washed with water, dried (magnesium sulfate) and concentrated to yield the title compound (7.4 g, 67.5%): TLC Rf 0.48 (silica, 9:1:1 dichloromethane:methanol:formic acid).

Aufarbeitung

  1. temperaturewas heated
  2. temperatureto reflux for 3 h
  3. temperaturecooled
  4. filtrationfiltered
  5. concentrationthe filtrate was concentrated
  6. extractionextracted with ethyl acetate
  7. concentrationwith concentrated hydrochloric
  8. extractionextracted with ethyl acetate
  9. washThe organic phase was washed with water
  10. dry with materialdried (magnesium sulfate)
  11. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-ccae603003f14fca9668b5a8da6d0d4d
Quelldatensatz
uspto-grants-1998_03
Patentnummer
US05726192

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