Sodium Carbonate → [2-(Methoxy)-3-nitrophenyl]acetaldehyde

HRID 1179617

Reaktionsgleichung

Reaktionsgleichung von HRID 1179617
COC1C([N+]([O-])=O)=CC=CC=1C=O.C1OCCOCCOCCOCCOCCOC1.[Cl-].COC[P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C(=O)([O-])[O-].[K+].[K+].[CH3:61][O:62][C:63]1[C:68]([N+:69]([O-:71])=[O:70])=[CH:67][CH:66]=[CH:65][C:64]=1/[CH:72]=[CH:73]/[O:74]C.COC1C([N+]([O-])=O)=CC=CC=1/C=C\OC.C(=O)([O-])[O-].[Na+].[Na+]>C1COCC1.Cl>[CH3:61][O:62][C:63]1[C:68]([N+:69]([O-:71])=[O:70])=[CH:67][CH:66]=[CH:65][C:64]=1[CH2:72][CH:73]=[O:74]

Komponenten

10

Edukt 7

HCID 10340Sodium CarbonateHCID 11430Potassium CarbonateHCID 2855718-Crown-6HCID 2723798Methoxymethyl-triphenylphosphonium chlorideHCID 140810742-Methoxy-3-nitrobenzaldehydeHCID 574542632-(methoxy)-1-[(E)-2-(methoxy)ethenyl]-3-nitrobenzeneHCID 684276382-(methyloxy)-1-[(Z)-2-(methyloxy)ethenyl]-3-nitrobenzene

Produkt 1

HCID 57444344[2-(Methoxy)-3-nitrophenyl]acetaldehydeAusbeute 54 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 313Hydrochloric AcidLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a stirred solution of 2-(methoxy)-3-nitrobenzaldehyde in THF were added 18-Crown6 (0.2 eq), (methoxymethyl)triphenylphosphonium chloride (2 eq) and potassium carbonate (6.5 eq). The resulting suspension was warmed to 60° C. for 2 hours then cooled to room temperature and filtered. The filtrate was concentrated under vacuum and purified by chromatography on a silica cartridge (eluent cyclohexane-ethyl acetate, 9:1) to give a mixture of 2-(methoxy)-1-[(E)-2-(methoxy)ethenyl]-3-nitrobenzene and 2-(methyloxy)-1-[(Z)-2-(methyloxy)ethenyl]-3-nitrobenzene. The alkene mixture was dissolved in THF and 6N hydrochloric acid (1:1), and stirred for 1 hour. The solution was made basic with aqueous sodium carbonate solution and extracted with DCM. The organic layer was washed (water, brine), dried (sodium sulfate) and concentrated under vacuum to give the title compound (54% overall yield).

Aufarbeitung

  1. temperaturethen cooled to room temperature
  2. filtrationfiltered
  3. concentrationThe filtrate was concentrated under vacuum
  4. custompurified by chromatography on a silica cartridge (eluent cyclohexane-ethyl acetate, 9:1)
  5. customto give
  6. extractionextracted with DCM
  7. washThe organic layer was washed (water, brine)
  8. dry with materialdried (sodium sulfate)
  9. concentrationconcentrated under vacuum

Quellen und Nachweise

ORD-Eintrag
ord-8af01f8160a54e8da9064b98cf545669
Quelldatensatz
uspto-grants-2007_10
Patentnummer
US07279481B2

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