Potassium Carbonate → HCID 44478735, Verbindung

HRID 1971785

Reaktionsgleichung

Reaktionsgleichung von HRID 1971785
Br[C:2]1[N:3]2[N:9]=[C:8]([O:10][CH3:11])[C:7]([NH:12][C:13](=[O:19])[O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[C:4]2[S:5][CH:6]=1.[C:20]([C:22]1[CH:27]=[C:26]([O:28][CH3:29])[C:25](B(O)O)=[C:24]([O:33][CH3:34])[CH:23]=1)#[N:21].C(=O)([O-])[O-].[K+].[K+].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.CCCCCCC.C(OCC)(=O)C.C(OCC)(=O)C.O.COCCOC>[C:15]([O:14][C:13](=[O:19])[NH:12][C:7]1[C:8]([O:10][CH3:11])=[N:9][N:3]2[C:2]([C:25]3[C:24]([O:33][CH3:34])=[CH:23][C:22]([C:20]#[N:21])=[CH:27][C:26]=3[O:28][CH3:29])=[CH:6][S:5][C:4]=12)([CH3:18])([CH3:17])[CH3:16]

Komponenten

10

Edukt 4

HCID 11430Potassium CarbonateHCID 11776TriphenylphosphineHCID 57912433(3-Bromo-6-methoxy-pyrazolo[5,1-b]thiazol-7-yl)-carbamic acid tert-butyl esterHCID 58816649HCID 58816649, Verbindung

Produkt 1

HCID 44478735HCID 44478735, VerbindungAusbeute 51,7 %

Reagenzien, Katalysatoren, Lösungsmittel 5

HCID 167845palladium(II) acetateKatalysatorHCID 962WaterLösungsmittel2×HCID 80711,2-DimethoxyethaneLösungsmittelHCID 8857Ethyl AcetateLösungsmittelHCID 21899848Ethylacetate heptaneLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

To a mixture of tert-butyl (3-bromo-6-methoxypyrazolo[5,1-b][1,3]thiazol-7-yl)carbamate (461 mg, 1.33 mmol), DME (49 mL) and water (16 mL) were added (4-cyano-2,6-dimethoxyphenyl)boronic acid (412 mg, 2.00 mmol), potassium carbonate (366 mg, 2.66 mmol), triphenylphosphine (174 mg, 0.659 mmol) and palladium acetate (29.8 mg, 0.132 mmol) in that order, and the mixture was stirred at 90° C. (internal temperature) for 2 hours. Water was added to the mixture, and then ethyl acetate was added. After thoroughly shaking the mixture, the organic layer was separated and the organic layer was washed with brine and dried over anhydrous magnesium sulfate. The mixture was filtered, and then the solvent in the filtrate was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (mixture of n-heptane and ethyl acetate: n-heptane/ethyl acetate=2/1 then 1/1) to obtain the title compound (296 mg, 0.688 mmol).

Aufarbeitung

  1. stirringAfter thoroughly shaking the mixture
  2. customthe organic layer was separated
  3. washthe organic layer was washed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationThe mixture was filtered
  6. distillationthe solvent in the filtrate was distilled off under reduced pressure
  7. customThe residue was purified by silica gel column chromatography (
  8. additionmixture of n-heptane and ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-27290163f36f4e06baf6d91a43d803f0
Quelldatensatz
uspto-grants-2013_04
Patentnummer
US08431603B2

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