Methanol → 3-Benzyloxycarbonylamino-2(r,s)-methylpropionic acid methyl ester

HRID 744848

Reaktionsgleichung

Reaktionsgleichung von HRID 744848
[CH2:1]([O:8][C:9]([NH:11][CH2:12][CH:13]([CH3:17])[C:14]([OH:16])=[O:15])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:18]O>S(=O)(=O)(O)O>[CH3:18][O:15][C:14](=[O:16])[CH:13]([CH3:17])[CH2:12][NH:11][C:9]([O:8][CH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1)=[O:10]

Komponenten

4

Edukt 2

HCID 887MethanolHCID 3042743-(((Benzyloxy)carbonyl)amino)-2-methylpropanoic acid

Produkt 1

HCID 223644703-Benzyloxycarbonylamino-2(r,s)-methylpropionic acid methyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1118Sulfuric AcidKatalysator

Versuchsvorschrift

22.6 g of 3-benzyloxycarbonylamino-2(R,S)-methylpropionic acid are left to stand for 24 hours in 230 ml of methanol with a few drops of concentrated sulfuric acid. The reaction mixture is concentrated by evaporation and the residue is purified by FC (220 g of silica gel, dichloromethane). The title compound is obtained: Rf (dichloromethane/methanol=95:5)=0.60.

Aufarbeitung

  1. concentrationThe reaction mixture is concentrated by evaporation
  2. customthe residue is purified by FC (220 g of silica gel, dichloromethane)

Quellen und Nachweise

ORD-Eintrag
ord-cc8983031c1e457db04f9006e1139e60
Quelldatensatz
uspto-grants-1996_09
Patentnummer
US05559111

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