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Lithium Chloride → 4-(1-ethoxyvinyl)-7-methyl-2H-chromen-2-one

HRID 2422514
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2422514
FC(F)(F)S(O[C:7]1[C:16]2[C:11](=[CH:12][C:13]([CH3:17])=[CH:14][CH:15]=2)[O:10][C:9](=[O:18])[CH:8]=1)(=O)=O.C([Sn](CCCC)(CCCC)[C:26]([O:28][CH2:29][CH3:30])=[CH2:27])CCC.[Cl-].[Li+]>O1CCOCC1.C(OCC)(=O)C.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH2:29]([O:28][C:26]([C:7]1[C:16]2[C:11](=[CH:12][C:13]([CH3:17])=[CH:14][CH:15]=2)[O:10][C:9](=[O:18])[CH:8]=1)=[CH2:27])[CH3:30]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 3

HCID 433294Lithium ChlorideHCID 619414Stannane, tributyl(1-ethoxyethenyl)-HCID 233702387-Methyl-2-oxo-2H-chromen-4-YL trifluoromethanesulfonate

Produkt 1

HCID 597748944-(1-ethoxyvinyl)-7-methyl-2H-chromen-2-one

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 11979704
Tetrakis(triphenylphosphine)palladium
Katalysator
HCID 8857Ethyl AcetateLösungsmittel
HCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

To a solution of 7-methyl-2-oxo-2H-chromen-4-yl trifluoromethanesulfonate (prepared as described in U.S. Pat. No. 5,552,437) (2.5 g, 8.1 mmol) and tributyl(1-ethoxyvinyl)tin (2.88 mL, 8.5 mmol) in 1,4-dioxane (25 mL), lithium chloride (1.03 g, 24.3 mmol) was added. The reaction flask was then purged twice with nitrogen and tetrakis(triphenylphosphine) palladium(0) (468 mg, 0.405 mmol) was added. The reaction was then heated overnight at 100° C. After cooling, the reaction mixture was concentrated under reduced pressure and the crude residue obtained was diluted with ethyl acetate, washed with a saturated ammonium chloride aq. solution, water and brine, dried over MgSO4, filtered and concentrated. The crude residue obtained was purified by column chromatography (EtOAc/hexanes, 25:75 to 40:60) to afford the title compound. 1H NMR (400 MHz, acetone-d6): 7.76 (d, 1H), 7.22 (s, 1H), 7.19 (d, 1H), 6.35 (s, 1H), 4.64 (d, 1H), 4.61 (d, 1H), 4.04 (q, 2H), 2.47 (s, 3H), 1.40 (t, 3H).

Aufarbeitung

  1. additionwas added
  2. temperatureAfter cooling
  3. concentrationthe reaction mixture was concentrated under reduced pressure
  4. customthe crude residue obtained
  5. washwashed with a saturated ammonium chloride aq. solution, water and brine
  6. dry with materialdried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe crude residue obtained
  10. customwas purified by column chromatography (EtOAc/hexanes, 25:75 to 40:60)

Quellen und Nachweise

ORD-Eintrag
ord-0c4c0dd4ea254113af1aa5f090f3cf78
Quelldatensatz
uspto-grants-2011_06
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07960409B2

Notizen zur Reaktion

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