Water → tetrahydro-4-(4-iodophenyl)-4-methoxy-2H-pyran

HRID 230291

Reaktionsgleichung

Reaktionsgleichung von HRID 230291
[I:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2([OH:14])[CH2:13][CH2:12][O:11][CH2:10][CH2:9]2)=[CH:4][CH:3]=1.[H-].[Na+].[CH3:17]I.O>CN(C=O)C>[I:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2([O:14][CH3:17])[CH2:9][CH2:10][O:11][CH2:12][CH2:13]2)=[CH:4][CH:3]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 57033480tetrahydro-4-(4-iodophenyl)-2H-pyran-4-ol

Produkt 1

HCID 57762532tetrahydro-4-(4-iodophenyl)-4-methoxy-2H-pyran

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

Under an argon atmosphere, a solution of tetrahydro-4-(4-iodophenyl)-2H-pyran-4-ol (2.99 g) in anhydrous DMF (10 ml) was added dropwise to a suspension of sodium hydride (60 wt %) (432 mg) in anhydrous DMF (20 ml) at room temperature, and the resulting mixture was stirred at room temperature for 75 minutes. Methyl iodide (0.92 ml) was added dropwise to the reaction solution and the resulting mixture was stirred at room temperature for 8.5 hours. Water was added thereto and the resulting mixture was extracted twice with ethyl acetate. Organic layers were washed with saturated brine, and dried over anhydrous sodium sulfate. After removing anhydrous sodium sulfate by filtration, the filtrate was concentrated. The residue was purified by column chromatography (silica gel, eluent: cyclohexane/ethyl acetate=10/1) to obtain tetrahydro-4-(4-iodophenyl)-4-methoxy-2H-pyran (2.87 g). NMR (H1, CDCl3): δ 1.90-2.02 (4H, m), 2.97 (3H, s), 3.80-3.88 (4H, m), 7.14 (1H, d, J=8.5 Hz), 7.70 (1H, d, J=8.5 Hz)

Aufarbeitung

  1. stirringthe resulting mixture was stirred at room temperature for 8.5 hours
  2. extractionthe resulting mixture was extracted twice with ethyl acetate
  3. washOrganic layers were washed with saturated brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. customAfter removing anhydrous sodium sulfate
  6. filtrationby filtration
  7. concentrationthe filtrate was concentrated
  8. customThe residue was purified by column chromatography (silica gel, eluent: cyclohexane/ethyl acetate=10/1)

Quellen und Nachweise

ORD-Eintrag
ord-ec2052f962eb4e3db4d1c5504c4b8a05
Quelldatensatz
uspto-grants-2009_07
Patentnummer
US07566724B2

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