Potassium Carbonate → Tert-butyl 4-(2-oxo-1,2-dihydropyridin-4-yloxy)piperidine-1-carboxylate

HRID 1518444Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1518444
[OH:1][C:2]1[CH:7]=[CH:6][NH:5][C:4](=[O:8])[CH:3]=1.CS(O[CH:14]1[CH2:19][CH2:18][N:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:16][CH2:15]1)(=O)=O.C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.CCOC(C)=O.O>[O:8]=[C:4]1[CH:3]=[C:2]([O:1][CH:14]2[CH2:19][CH2:18][N:17]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:16][CH2:15]2)[CH:7]=[CH:6][NH:5]1

Komponenten

7

Edukt 3

HCID 11430Potassium CarbonateHCID 41848691-(tert-Butoxycarbonyl)-4-(methanesulfonyloxy)piperidineHCID 546960044-Hydroxy-2(1H)-pyridinone

Produkt 1

HCID 67366878Tert-butyl 4-(2-oxo-1,2-dihydropyridin-4-yloxy)piperidine-1-carboxylateAusbeute 38,7 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

A stirring mixture of 4-hydroxypyridin-2(1H)-one (1.2 g, 10 8 mmol, prepared according to the procedure described at Step A of Example 8), tert-butyl 4-(methylsulfonyloxy)piperidine-1-carboxylate (4.83 g, 17 3 mmol, prepared according to the procedure described at Step C of Example 1) and potassium carbonate (3.13 g, 22 7 mmol) in DMF (45 mL) was heated at 90° C. for 14 hrs and then cooled to room temperature. The resulting mixture was diluted with EtOAc and H2O and the aqueous layer was extracted further with EtOAc (5×). The combined extracts were washed with brine, dried (Na2SO4) and evaporated under reduced pressure. The residual was purified by flash chromatography on silica gel (0 to 10% MeOH/CH2Cl2) to yield 1.23 g (38.7%) of the product as a pinkish solid. MS (ESI) 295 (M+H).

Aufarbeitung

  1. customprepared
  2. customprepared
  3. temperaturecooled to room temperature
  4. extractionthe aqueous layer was extracted further with EtOAc (5×)
  5. washThe combined extracts were washed with brine
  6. dry with materialdried (Na2SO4)
  7. customevaporated under reduced pressure
  8. customThe residual was purified by flash chromatography on silica gel (0 to 10% MeOH/CH2Cl2)

Quellen und Nachweise

ORD-Eintrag
ord-91f151dacfa54c258d3517d1190ae0ba
Quelldatensatz
uspto-grants-2012_07
Patentnummer
US08232404B2

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