Dimethylformamide → 8-Methoxycarbonyl-7-(2-methoxyphenyl)-3,3-dimethyl-3,4-dihydro-1H-quinoxalin-2-one

HRID 871964Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 871964
Br[C:2]1[C:11]([C:12]([O:14][CH3:15])=[O:13])=[C:10]2[C:5]([NH:6][C:7]([CH3:18])([CH3:17])[C:8](=[O:16])[NH:9]2)=[CH:4][CH:3]=1.[CH3:19][O:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1B(O)O.C(=O)([O-])[O-].CN(C)C=O>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O.C(OCC)(=O)C>[CH3:15][O:14][C:12]([C:11]1[C:2]([C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=2[O:20][CH3:19])=[CH:3][CH:4]=[C:5]2[C:10]=1[NH:9][C:8](=[O:16])[C:7]([CH3:18])([CH3:17])[NH:6]2)=[O:13]

Komponenten

8

Edukt 4

HCID 6228DimethylformamideHCID 19660Carbonate IonHCID 27339582-Methoxyphenylboronic acidHCID 24780709Methyl 6-bromo-2,2-dimethyl-3-oxo-1,2,3,4-tetrahydroquinoxaline-5-carboxylate

Produkt 1

HCID 247808448-Methoxycarbonyl-7-(2-methoxyphenyl)-3,3-dimethyl-3,4-dihydro-1H-quinoxalin-2-oneAusbeute 53,3 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418476HCID 178418476, VerbindungKatalysatorHCID 962WaterLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of 7-bromo-8-methoxycarbonyl-3,3-dimethyl-3,4-dihydro-1H-quinoxalin-2-one (Reference Compound No. 1, 203 mg, 0.64 mmol), 2-methoxyphenylboronic acid (196 mg, 1.28 mmol), cessium carbonate (629 mg, 1.92 mmol) and bis(triphenylphosphine)palladium dichloride (II) (45.8 mg, 0.06 mmol) was suspended with anhydrous N,N-dimethylformamide (3 ml) and stirred at 80° C. for days. After the mixture was cooled down, ethyl acetate (30 mL) and water (30 mL) were added thereto and the mixture was partitioned. The organic layer was washed with water (30 mL) and saturated brine (30 mL) successively, dried over anhydrous magnesium sulfate, and then the solvent was removed under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate) to give the titled reference compound (116 mg) as a pale yellow amorphous product. (Yield 31%)

Aufarbeitung

  1. temperatureAfter the mixture was cooled down
  2. customthe mixture was partitioned
  3. washThe organic layer was washed with water (30 mL) and saturated brine (30 mL) successively
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customthe solvent was removed under reduced pressure
  6. customThe obtained residue was purified by silica gel column chromatography (hexane-ethyl acetate)

Quellen und Nachweise

ORD-Eintrag
ord-bb6e399cd8154e71a95974600cc9c760
Quelldatensatz
uspto-grants-2015_03
Patentnummer
US08975256B2

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