Hydrochloric Acid → 3,4-Dimethoxy-5-triisopropylsilanyloxymethylbenzaldehyde

HRID 1161412Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1161412
Br[C:2]1[CH:3]=[C:4]([O:22][CH3:23])[C:5]([O:20][CH3:21])=[C:6]([CH:19]=1)[CH2:7][O:8][Si:9]([CH:16]([CH3:18])[CH3:17])([CH:13]([CH3:15])[CH3:14])[CH:10]([CH3:12])[CH3:11].C([Li])CCC.[CH:29](N1CCOCC1)=[O:30].Cl>C1COCC1.C(OCC)(=O)C>[CH3:23][O:22][C:4]1[CH:3]=[C:2]([CH:19]=[C:6]([CH2:7][O:8][Si:9]([CH:16]([CH3:18])[CH3:17])([CH:13]([CH3:15])[CH3:14])[CH:10]([CH3:12])[CH3:11])[C:5]=1[O:20][CH3:21])[CH:29]=[O:30]

Komponenten

7

Edukt 4

HCID 313Hydrochloric AcidHCID 20417N-FormylmorpholineHCID 67097070(5-Bromo-2,3-dimethoxybenzyloxy)triisopropylsilaneHCID 178418339Butyllithium

Produkt 1

HCID 595168883,4-Dimethoxy-5-triisopropylsilanyloxymethylbenzaldehyde

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028TetrahydrofuranLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

To a solution of the 3.616 g of (5-bromo-2,3-dimethoxybenzyloxy)triisopropylsilane in 60 ml of THF there was added dropwise 3.6 ml of n-butyllithium (2.66 M, hexane solution) at −78° C. under a nitrogen atmosphere. After stirring for 15 minutes, 2 ml of N-formylmorpholine was added and the mixture was stirred at room temperature for 20 minutes. Next, 1N hydrochloric acid was added to the reaction mixture and extraction was performed with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate. The desiccating agent was filtered off and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate-heptane) to give the title compound (2.605 g) as an oil.

Aufarbeitung

  1. stirringthe mixture was stirred at room temperature for 20 minutes
  2. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
  3. filtrationThe desiccating agent was filtered off
  4. concentrationthe filtrate was concentrated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (ethyl acetate-heptane)

Quellen und Nachweise

ORD-Eintrag
ord-c320b52b75e24e94a659ac243ba1d4a1
Quelldatensatz
uspto-grants-2010_10
Patentnummer
US07816522B2

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