Sodium Carbonate → rac-(4aR*,8aR*)-tert-butyl 2-oxohexahydro-2H-pyrido[4,3-e][1,3]oxazine-7(3H)-carboxylate
Reaktionsgleichung
[NH2:1][CH2:2][CH:3]1[CH2:8][CH2:7][N:6]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:5][CH:4]1[OH:16].C1N=CN([C:22](N2C=NC=C2)=[O:23])C=1.C([O-])([O-])=O.[Na+].[Na+]>CCC(C)=O>[O:23]=[C:22]1[NH:1][CH2:2][CH:3]2[CH2:8][CH2:7][N:6]([C:9]([O:11][C:12]([CH3:13])([CH3:15])[CH3:14])=[O:10])[CH2:5][CH:4]2[O:16]1Komponenten
5
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 60 °C
Versuchsvorschrift
To a mixture of rac-(3R*,4R*)-tert-butyl 4-(aminomethyl)-3-hydroxypiperidine-1-carboxylate (3.39 g, 14.72 mmol; prepared according to Tetrahedron (2008), 64, 2456-2464) in MEK (40 mL) heated to 60° C. was added CDI (3.58 g, 22.08 mmol, 1.5 eq). The mixture was stirred for 3 h. Na2CO3 (5% aq., 4 mL) was added. The reaction proceeded at rt for 70 min. The two layers were decanted and the aq. layer was extracted with EA (10 mL). The combined org. layers were washed with brine (8 mL), dried over Na2SO4, filtered and concentrated to dryness. The residue was purified by CC (DCM to DCM/MeOH 9:1) to afford the title compound as a white solid (2.59 g).
Aufarbeitung
- waitThe reaction proceeded at rt for 70 min
- customThe two layers were decanted
- extractionthe aq. layer was extracted with EA (10 mL)
- washlayers were washed with brine (8 mL)
- dry with materialdried over Na2SO4
- filtrationfiltered
- concentrationconcentrated to dryness
- customThe residue was purified by CC (DCM to DCM/MeOH 9:1)
Quellen und Nachweise
- ORD-Eintrag
- ord-66a48c60ac6c47f8a75cf4d4c77a06f6
- Quelldatensatz
- uspto-grants-2015_05
- Patentnummer
- US09029368B2
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