Sodium sulfate decahydrate → (R)-tert-butyl 1-(4-(hydroxymethyl)oxazol-2-yl)ethylcarbamate
Reaktionsgleichung
C[O:2][C:3]([C:5]1[N:6]=[C:7]([C@H:10]([NH:12][C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH3:11])[O:8][CH:9]=1)=O.[H-].[Al+3].[Li+].[H-].[H-].[H-].O.O.O.O.O.O.O.O.O.O.S([O-])([O-])(=O)=O.[Na+].[Na+]>C1COCC1>[C:16]([O:15][C:13](=[O:14])[NH:12][C@@H:10]([C:7]1[O:8][CH:9]=[C:5]([CH2:3][OH:2])[N:6]=1)[CH3:11])([CH3:17])([CH3:18])[CH3:19]Komponenten
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 0 °C
Versuchsvorschrift
In a round-bottomed flask, 2-((R)-1-tert-butoxycarbonylamino-ethyl)-oxazole-4-carboxylic acid methyl ester (151 mg, 0.56 mmol) was dissolved in THF (4 ml). The pale yellow solution was cooled to 0° C. and lithium aluminum hydride (1.0 M in THF, 0.60 ml, 0.60 mmol) was added dropwise. The reaction mixture was stirred at 0° C. for 1.5 h then sodium sulfate decahydrate was carefully added. When gas evolution had ceased, the ice bath was removed, sodium sulfate was added and the mixture was stirred vigorously for 30 min at room temperature. The suspension was filtered over Celite and rinsed with ethyl acetate/methanol. The filtrate was concentrated to give 140 mg (93%) of [(R)-1-(4-hydroxymethyl-oxazol-2-yl)-ethyl]-carbamic acid tert-butyl ester as yellow oil which was used without further purification.
Aufarbeitung
- customthe ice bath was removed
- additionsodium sulfate was added
- stirringthe mixture was stirred vigorously for 30 min at room temperature
- filtrationThe suspension was filtered over Celite
- washrinsed with ethyl acetate/methanol
- concentrationThe filtrate was concentrated
Quellen und Nachweise
- ORD-Eintrag
- ord-278991eb5df74b4c81db848bd5717321
- Quelldatensatz
- uspto-grants-2014_02
- Patentnummer
- US08658646B2
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