Water → Ethyl L-cysteinate

HRID 371068

Reaktionsgleichung

Reaktionsgleichung von HRID 371068
O.Cl.[NH2:3][C@H:4]([C:7]([O:9][CH2:10][CH3:11])=[O:8])[CH2:5][SH:6]>C(O)C.C(=O)([O-])[O-].[Ag+2]>[NH2:3][C@H:4]([C:7]([O:9][CH2:10][CH3:11])=[O:8])[CH2:5][SH:6]

Komponenten

5

Edukt 2

HCID 962WaterHCID 2723617Ethyl cysteinate hydrochloride

Produkt 1

HCID 13359Ethyl L-cysteinateAusbeute 293,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418647HCID 178418647, VerbindungKatalysatorHCID 702EthanolLösungsmittel

Versuchsvorschrift

1.3 g of sulfodehydroabietic acid is dissolved in 15 ml of ethanol and 0.472 mg of silver carbonate and 20 ml of water are added thereto. 0.635 g of ethyl L-cysteinate hydrochloride are added to the mixture and said mixture is stirred at room temperature. The precipitates are filtered off and the filtrate is concentrated to dryness under reduced pressure. The residue is recrystallized from a mixture of methanol and ethyl acetate, whereby 1.5 g of sulfodehydroabietic acid ethyl L-cysteinate salt hemihydrate is obtained.

Aufarbeitung

  1. filtrationThe precipitates are filtered off
  2. concentrationthe filtrate is concentrated to dryness under reduced pressure
  3. customThe residue is recrystallized from a mixture of methanol and ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-44d69d7bac994cddb8d765ad2efb1853
Quelldatensatz
uspto-grants-1985_07
Patentnummer
US04529602

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