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Ethyl Acetate → Diethyl (7,8-difluoro-3-methyl-3,4-dihydro-2H-[1,4]benzoxazine-4-yl)methylenemalonate

HRID 1034035
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1034035
[F:1][C:2]1[C:7]([F:8])=[CH:6][CH:5]=[C:4]([NH:9][CH:10]=[C:11]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:12]([O:14][CH2:15][CH3:16])=[O:13])[C:3]=1[O:22][CH2:23][CH:24](OS(C1C=CC(C)=CC=1)(=O)=O)[CH3:25].C(=O)([O-])[O-].[K+].[K+].C1OCCOCCOCCOCCOCCOC1.C(OCC)(=O)C>CN(C)C=O.O>[F:8][C:7]1[CH:6]=[CH:5][C:4]2[N:9]([CH:10]=[C:11]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:24]([CH3:25])[CH2:23][O:22][C:3]=2[C:2]=1[F:1]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 2855718-Crown-6HCID 146971842,3-Difluoro-6-(2,2-diethoxycarbonylethenyl)amino-[(2-p-toluenesulfonyloxypropyl)oxy]benzene

Produkt 1

HCID 13364401Diethyl (7,8-difluoro-3-methyl-3,4-dihydro-2H-[1,4]benzoxazine-4-yl)methylenemalonate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittel2×

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To a solution of 791 mg of the compound obtained in Example 4 in 5 ml of anhydrous N,N-dimethylformamide (hereinafter abbreviated as DMF), 207 mg of potassium carbonate and a catalytic amount of 18-crown-6-ether were added, and the mixture was heated at 80° C. for 8.5 hours. To the mixture were added ethyl acetate and water. The mixture was shaken, and the organic layer was separated. The organic layer was washed with water and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The residue was purified through silica gel column chromatography to yield the titled compound as crystals in quantitative yield. The physical data of the product were identical to those of the authentic specimen as described in Reference Example B-1.

Aufarbeitung

  1. customthe organic layer was separated
  2. washThe organic layer was washed with water
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customThe solvent was removed under reduced pressure
  5. customThe residue was purified through silica gel column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-f0574e6c87b8428b9e9d7b5c741ab07b
Quelldatensatz
uspto-grants-1994_05
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US05312999

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