Methanol → S-(4-Methylbenzyl)-L-Cysteine, Methyl Ester, Hydrochloride

HRID 257529Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 257529
S(Cl)([Cl:3])=O.C(OC([NH:12][C@H:13]([C:24]([OH:26])=[O:25])[CH2:14][S:15][CH2:16][C:17]1[CH:22]=[CH:21][C:20]([CH3:23])=[CH:19][CH:18]=1)=O)(C)(C)C.[CH3:27]O>>[ClH:3].[CH3:23][C:20]1[CH:19]=[CH:18][C:17]([CH2:16][S:15][CH2:14][C@@H:13]([C:24]([O:26][CH3:27])=[O:25])[NH2:12])=[CH:22][CH:21]=1

Komponenten

4

Edukt 3

HCID 887MethanolHCID 24386Thionyl ChlorideHCID 7010551N-alpha-t-Butyloxycarbonyl-S-(4-methyl-benzyl)-L-cysteine

Produkt 1

HCID 14390657S-(4-Methylbenzyl)-L-Cysteine, Methyl Ester, Hydrochloride

Versuchsvorschrift

At room temperature, add thionyl chloride (2.8 ml, 2.2 equiv.) dropwise to N-t-butyloxycarbonyl-S-(4-methylbenzyl)-L-cysteine (5.0 g) in methanol (500 ml) and heat the resulting mixture under reflux for 90 minutes. Cool the reaction mixture to room temperature and concentrate in vacuo to give the title compound, a white solid (4.31 g), m.p. 158°-160°, [α]D26 =-22.9° (MeOH).

Aufarbeitung

  1. temperatureheat the resulting mixture
  2. temperatureunder reflux for 90 minutes
  3. concentrationconcentrate in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-819f6675241444b2835bdf41dfb5db87
Quelldatensatz
uspto-grants-1993_11
Patentnummer
US05262436

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