Ammonium Chloride → 2-Benzyloxy-4,6-dimethylpyridin-3-yl 4-(2-methoxymethyloxyethyl)phenyl methanol

HRID 916579Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 916579
[CH3:1][O:2][CH2:3][O:4][CH2:5][CH2:6][C:7]1[CH:12]=[CH:11][C:10](Br)=[CH:9][CH:8]=1.C([Li])(C)(C)C.[CH2:19]([O:26][C:27]1[C:32]([CH:33]=[O:34])=[C:31]([CH3:35])[CH:30]=[C:29]([CH3:36])[N:28]=1)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1.[Cl-].[NH4+]>O1CCCC1>[CH2:19]([O:26][C:27]1[C:32]([CH:33]([C:10]2[CH:11]=[CH:12][C:7]([CH2:6][CH2:5][O:4][CH2:3][O:2][CH3:1])=[CH:8][CH:9]=2)[OH:34])=[C:31]([CH3:35])[CH:30]=[C:29]([CH3:36])[N:28]=1)[C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1

Komponenten

6

Edukt 4

HCID 25517Ammonium ChlorideHCID 155094031-Bromo-4-[2-(methoxymethoxy)ethyl]benzeneHCID 229349822-(Benzyloxy)-4,6-dimethylnicotinaldehydeHCID 178418306HCID 178418306, Verbindung

Produkt 1

HCID 694217802-Benzyloxy-4,6-dimethylpyridin-3-yl 4-(2-methoxymethyloxyethyl)phenyl methanolAusbeute 89,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

To a solution of 4-(2-methoxymethyloxyethyl) bromobenzene (0.60 g) in tetrahydrofuran (6 mL) was added tert-butyllithium (1.5 mol/L solution in hexane, 2.0 mL) at −78° C. under an argon atmosphere, and the mixture was stirred for 30 minutes. Then, a solution of 2-benzyloxy-3-formyl-4,6-dimethylpyridine (0.49 g) in tetrahydrofuran (5 mL) was added to the reaction mixture, and the mixture was stirred for 3 hours at 0° C. To the reaction mixture was added saturated aqueous ammonium chloride solution, and the mixture was extracted with dimethyl ether. The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: hexane/ethyl acetate=5/1) to give 2-benzyloxy-4,6-dimethylpyridin-3-yl 4-(2-methoxymethyloxyethyl)phenyl methanol (0.74 g). To a solution of the obtained 2-benzyloxy-4,6-dimethylpyridin-3-yl 4-(2-methoxymethyloxyethyl)phenyl methanol (0.11 g) in ethanol (5.3 mL) was added 10% palladium carbon powder (0.065 g), and the mixture was stirred for 11 hours at room temperature under a hydrogen atmosphere. The insoluble material was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified by preparative thin layer chromatography on silica gel (developing solvent: dichloro-methane/methanol=10/1) to give 3-[4-(2-methoxymethyloxy-ethyl)benzyl]-4,6-dimethyl-1H-pyridin-2-one (0.074 g).

Aufarbeitung

  1. stirringthe mixture was stirred for 3 hours at 0° C
  2. extractionthe mixture was extracted with dimethyl ether
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by column chromatography on silica gel (eluent: hexane/ethyl acetate=5/1)

Quellen und Nachweise

ORD-Eintrag
ord-8c334b64b91c4e749f99fe3e4ae7010f
Quelldatensatz
uspto-grants-2007_09
Patentnummer
US07271153B2

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