Potassium Carbonate → 3,5-Bis(4-cyanophenoxy)benzoic acid ethyl ester

HRID 1024714

Reaktionsgleichung

Reaktionsgleichung von HRID 1024714
C(=O)([O-])[O-].[K+].[K+].[CH2:7]([O:9][C:10](=[O:19])[C:11]1[CH:16]=[C:15]([OH:17])[CH:14]=[C:13]([OH:18])[CH:12]=1)[CH3:8].F[C:21]1[CH:28]=[CH:27][C:24]([C:25]#[N:26])=[CH:23][CH:22]=1>CN(C=O)C>[CH2:7]([O:9][C:10](=[O:19])[C:11]1[CH:16]=[C:15]([O:17][C:21]2[CH:28]=[CH:27][C:24]([C:25]#[N:26])=[CH:23][CH:22]=2)[CH:14]=[C:13]([O:18][C:21]2[CH:28]=[CH:27][C:24]([C:25]#[N:26])=[CH:23][CH:22]=2)[CH:12]=1)[CH3:8]

Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 145174-FluorobenzonitrileHCID 20098Benzoic acid, 3,5-dihydroxy-, ethyl ester

Produkt 1

HCID 668184803,5-Bis(4-cyanophenoxy)benzoic acid ethyl esterAusbeute 61,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

Potassium carbonate 0.611 g (4.4 mmol) was added to a stirred solution of 3,5-dihydroxy-benzoic acid ethyl ester 0.5 g (1.7 mmol) dissolved in 15 ml of DMF and stirred for 10 min. This was followed by dropwise addition of 4-fluorobenzonitrile 0.82 g (6.8 mmol), dissolved in 5 ml of DMF, and the contents of the flask were stirred at 80° C. for 4 h. The reaction mixture was poured into ice-cold water, and extracted with ethyl acetate. The organic phase was washed with Na2CO3 and saturated brine solution, dried over sodium sulphate and concentrated to afford an oily residue which was purified by column chromatography using hexane-ethyl acetate (10:2) to afford 0.4 g of the required product. The yield was 0.6 g. 1H NMR (DMSO-d6): δ 1.30 (3H, t), 4.30 (2H, q), 7.25 (2H, d), 7.32 (1H, t), 7.46 (2H, d), 7.90 (2H, d).

Aufarbeitung

  1. stirringthe contents of the flask were stirred at 80° C. for 4 h
  2. additionThe reaction mixture was poured into ice-cold water
  3. extractionextracted with ethyl acetate
  4. washThe organic phase was washed with Na2CO3 and saturated brine solution
  5. dry with materialdried over sodium sulphate
  6. concentrationconcentrated
  7. customto afford an oily residue which
  8. customwas purified by column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-f563024513b946bebffd9ffb7df08b09
Quelldatensatz
uspto-grants-2014_05
Patentnummer
US08722930B2

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