Methyl iodide → 2,4-Bis(ethoxymethoxy)-1-methoxybenzene

HRID 1511405Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1511405
[C:1](=O)([O-])[O-].[K+].[K+].[CH2:7]([O:9][CH2:10][O:11][C:12]1[CH:17]=[C:16]([O:18][CH2:19][O:20][CH2:21][CH3:22])[CH:15]=[CH:14][C:13]=1[OH:23])[CH3:8].CI>CN(C)C=O>[CH2:7]([O:9][CH2:10][O:11][C:12]1[CH:17]=[C:16]([O:18][CH2:19][O:20][CH2:21][CH3:22])[CH:15]=[CH:14][C:13]=1[O:23][CH3:1])[CH3:8]

Komponenten

5

Edukt 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 251402532,4-Bis(ethoxymethoxy)phenol

Produkt 1

HCID 251409932,4-Bis(ethoxymethoxy)-1-methoxybenzeneAusbeute 91 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Potassium carbonate (14.3 g, 103 mmol) was added to 3a (2.50 g, 10.3 mmol) in N,N-dimethylformamide (103 mL). After 10 minutes, methyl iodide (6.43 mL, 103 mmol) was added and the solution was heated to reflux for 12 hours. Upon cooling to room temperature, the solution was extracted with EtOAc (3×50 mL); combined organic fractions were washed with saturated aqueous NaCl, dried (Na2SO4), and concentrated. The residue was purified by column chromatography (SiO2, 4:1 Hexane:EtOAc) to afford 4a as a yellow oil (2.40 g, 91%): 1H NMR (CDCl3, 500 MHz) δ 6.87 (d, J=2.8 Hz, 1H), 6.72 (d, J=8.9 Hz, 1H), 6.60 (dd, J=13.3, 1.7 Hz, 1H), 5.18 (s, 2H), 5.07 (s, 2H), 3.76 (s, 3H), 3.72-3.69 (m, 2H), 3.68-3.63 (m, 2H), 1.17-1.13 (m, 6H); 13C NMR (CDCl3, 125 MHz) δ 150.7, 146.2, 143.9, 111.2, 107.9, 105.8, 93.2, 93.0, 63.3, 63.0, 55.4, 14.1, 14.0; IR (film) νmax 2976, 2932, 2899, 2835, 1595, 1508, 1393, 1227, 1153, 1103, 1080, 1009, 847 cm−1; HRMS (ESI+) m/z: [M+Na]+ calcd for C13H20O5, 279.1208; found, 279.1181.

Aufarbeitung

  1. temperaturethe solution was heated
  2. temperatureto reflux for 12 hours
  3. extractionthe solution was extracted with EtOAc (3×50 mL)
  4. washcombined organic fractions were washed with saturated aqueous NaCl
  5. dry with materialdried (Na2SO4)
  6. concentrationconcentrated
  7. customThe residue was purified by column chromatography (SiO2, 4:1 Hexane:EtOAc)

Quellen und Nachweise

ORD-Eintrag
ord-0f7eea7919844cd0b40b8ec5fb5ef17c
Quelldatensatz
uspto-grants-2012_07
Patentnummer
US08212012B2

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