2,5-Dibromopyridine → tert-Butyl 4-((5-bromopyridin-2-yl)amino)piperidine-1-carboxylate
Reaktionsgleichung
Br[C:2]1[CH:7]=[CH:6][C:5]([Br:8])=[CH:4][N:3]=1.[C:9]([O:13][C:14]([N:16]1[CH2:21][CH2:20][CH:19]([NH2:22])[CH2:18][CH2:17]1)=[O:15])([CH3:12])([CH3:11])[CH3:10].C(N(C(C)C)CC)(C)C>CN1CCCC1=O>[C:9]([O:13][C:14]([N:16]1[CH2:21][CH2:20][CH:19]([NH:22][C:2]2[CH:7]=[CH:6][C:5]([Br:8])=[CH:4][N:3]=2)[CH2:18][CH2:17]1)=[O:15])([CH3:12])([CH3:10])[CH3:11]Komponenten
Reaktionsbedingungen
- Temperatur
- 80 °C
Versuchsvorschrift
A tube was charged with 2,5-dibromopyridine (0.24 g, 1.0 mmol), 4-Amino-piperidine-1-carboxylic acid tert-butyl ester (0.22 g, 1.1 mmol), di-isopropylethylamine (0.19 mL, 1.1 mmol) and N-methylpyrrolidinone (1.0 mL). The tube was sealed and the mixture was heated at 80° C. overnight. The temperature was increased to 120° C. and heated overnight. The reaction was partitioned between ethyl acetate and water. The phases were separated and the aqueous phase was extracted with ethyl acetate. The combined organic phases were dried over MgSO4 and concentrated by rotary evaporation. The residue was purified by silica gel chromatography using gradient elution of ethyl acetate and hexanes to afford 4-(5-bromo-pyridin-2-ylamino)-piperidine-1-carboxylic acid tert-butyl ester (36 mg, 10%).
Aufarbeitung
- customThe tube was sealed
- temperatureThe temperature was increased to 120° C.
- temperatureheated overnight
- customThe reaction was partitioned between ethyl acetate and water
- customThe phases were separated
- extractionthe aqueous phase was extracted with ethyl acetate
- dry with materialThe combined organic phases were dried over MgSO4
- concentrationconcentrated by rotary evaporation
- customThe residue was purified by silica gel chromatography
- washelution of ethyl acetate and hexanes
Quellen und Nachweise
- ORD-Eintrag
- ord-94bf8bf1e991489dbb1b810d9372ea8a
- Quelldatensatz
- uspto-grants-2014_07
- Patentnummer
- US08785632B2
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