Reaktionsgleichung
[NH2:1][C@@H:2]([C:8]([OH:10])=[O:9])[CH2:3][CH2:4][C:5]([OH:7])=O.[OH-].[Na+].[N:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1[CH:19]=O.[BH4-].[Na+]>>[O:7]=[C:5]1[N:1]([CH2:19][C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][N:13]=2)[C@H:2]([C:8]([OH:10])=[O:9])[CH2:3][CH2:4]1Komponenten
Versuchsvorschrift
D-glutamic acid (2.21 g, 15 mmol) was dissolved in 2N aqueous sodium hydroxide (15 ml, 30 mmol) at 0° C. and then treated with pyridine-2-carboxaldehyde (1.43 ml, 15 mmol). The mixture was stirred at room temperature for 45 minutes and then cooled to 0° C. and treated with sodium borohydride (0.189 g, 5 mmol). The mixture was allowed to warm to room temperature with stirring over 4 hrs then after washing twice with diethyl ether it was acidified to pH5-6. The aqueous layer was concentrated then azeotroped three times with toluene and then with a 1:1 ethanol:toluene mixture and finally with ethanol. The residue was then taken up in ethanol (50 ml) and refluxed for 8 hrs. Concentration gave an oil which when dried in vacuo gave 5-oxo-1-(2-pyridinylmethyl)proline (2.60 g) as a foam which was used without any further purification.
Aufarbeitung
- temperaturecooled to 0° C.
- temperatureto warm to room temperature
- stirringwith stirring over 4 hrs
- washafter washing twice with diethyl ether it
- concentrationThe aqueous layer was concentrated
- customthen azeotroped three times with toluene
- temperaturerefluxed for 8 hrs
- concentrationConcentration
- customgave an oil which when
- customdried in vacuo
Quellen und Nachweise
- ORD-Eintrag
- ord-0353ae516fd2494f9f82f3028095894f
- Quelldatensatz
- uspto-grants-2011_11
- Patentnummer
- US08048907B2
Verknüpfte Notizen
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