Potassium Carbonate → 2-(2,5-Dimethyl-1H-pyrrol-1-yl)-4-methyl-6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazine

HRID 1185199Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1185199
Br[CH2:2][CH2:3][N:4]1[C:8]([CH:9]([OH:11])[CH3:10])=[CH:7][C:6]([N:12]2[C:16]([CH3:17])=[CH:15][CH:14]=[C:13]2[CH3:18])=[N:5]1.C([O-])([O-])=O.[K+].[K+]>C(#N)C>[CH3:18][C:13]1[N:12]([C:6]2[CH:7]=[C:8]3[CH:9]([CH3:10])[O:11][CH2:2][CH2:3][N:4]3[N:5]=2)[C:16]([CH3:17])=[CH:15][CH:14]=1

Komponenten

4

Edukt 2

HCID 11430Potassium CarbonateHCID 866840491-(1-(2-Bromoethyl)-3-(2,5-dimethyl-1H-pyrrol-1-yl)-1H-pyrazol-5-yl)ethanol

Produkt 1

HCID 866840502-(2,5-Dimethyl-1H-pyrrol-1-yl)-4-methyl-6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazineAusbeute 37,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

A 100-mL round-bottomed flask equipped with a reflux condenser was charged with 150f (2.0 g, 1.0 eq., 6.4 mmol), K2CO3 (1.77 g, 2.0 eq., 12.8 mmol), acetonitrile (50 mL). The reaction mixture was reflux overnight. It was then cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure. The residue was purified by silica-gel column chromatography eluting with 4:1 petroleum ether/ethyl acetate to afford 150g (550 mg, 37%, over two steps) as a colorless oil. MS-ESI: [M+H]+ 232.3

Aufarbeitung

  1. customA 100-mL round-bottomed flask equipped with a reflux condenser
  2. temperatureThe reaction mixture was reflux overnight
  3. filtrationfiltered
  4. concentrationThe filtrate was concentrated under reduced pressure
  5. customThe residue was purified by silica-gel column chromatography
  6. washeluting with 4:1 petroleum ether/ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-4313e65368224714b5866a23a6016d6f
Quelldatensatz
uspto-grants-2014_03
Patentnummer
US08669251B2

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