Tetrahydrofuran → 4-Chloro-3-(3,5-dichloro-pyridin-2-yl)-benzoic acid

HRID 661645Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 661645
C1COCC1.C[O:7][C:8](=[O:24])[C:9]1[CH:14]=[CH:13][C:12]([Cl:15])=[C:11]([C:16]2[C:21]([Cl:22])=[CH:20][C:19]([Cl:23])=[CH:18][N:17]=2)[CH:10]=1.O[Li].O>O>[Cl:15][C:12]1[CH:13]=[CH:14][C:9]([C:8]([OH:24])=[O:7])=[CH:10][C:11]=1[C:16]1[C:21]([Cl:22])=[CH:20][C:19]([Cl:23])=[CH:18][N:17]=1

Komponenten

5

Edukt 3

HCID 8028TetrahydrofuranHCID 168937Lithium hydroxide, monohydrateHCID 686021224-Chloro-3-(3,5-dichloro-pyridin-2-yl)-benzoic acid methyl ester

Produkt 1

HCID 686040024-Chloro-3-(3,5-dichloro-pyridin-2-yl)-benzoic acidAusbeute 85,7 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Versuchsvorschrift

A mixture of THF (15 mL) and water (1 mL) containing 4-chloro-3-(3,5-dichloro-pyridin-2-yl)-benzoic acid methyl ester (1.7 g, 5.4 mmol) and LiOH.H2O (0.68 g, 16.1 mmol) was stirred at room temperature for 12 hrs. The mixture was acidified and extracted with ethyl acetate. The organic layer was washed with brine and water and was dried. Filtration and concentration gave 4-chloro-3-(3,5-dichloro-pyridin-2-yl)-benzoic acid as a white solid (1.4 g). MS (M+H)+: 301.6, tR=7.048 min (method 2)

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with brine and water
  3. customwas dried
  4. filtrationFiltration and concentration

Quellen und Nachweise

ORD-Eintrag
ord-385924059b934de9a74a019fb2c1e3f5
Quelldatensatz
uspto-grants-2011_12
Patentnummer
US08084614B2

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