Hydrochloric Acid → 5-Chloro-2-fluoro-4-((4-oxocyclohexyl)oxy)benzoic acid

HRID 1849803Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1849803
O1[C:5]2([CH2:10][CH2:9][CH:8]([O:11][C:12]3[C:20]([Cl:21])=[CH:19][C:15]([C:16]([OH:18])=[O:17])=[C:14]([F:22])[CH:13]=3)[CH2:7][CH2:6]2)[O:4]CC1.Cl>CC(C)=O.[Cl-].[Na+].O>[Cl:21][C:20]1[C:12]([O:11][CH:8]2[CH2:9][CH2:10][C:5](=[O:4])[CH2:6][CH2:7]2)=[CH:13][C:14]([F:22])=[C:15]([CH:19]=1)[C:16]([OH:18])=[O:17]

Komponenten

5

Edukt 2

HCID 313Hydrochloric AcidHCID 867036854-(1,4-Dioxaspiro[4.5]decan-8-yloxy)-5-chloro-2-fluorobenzoic acid

Produkt 1

HCID 867036865-Chloro-2-fluoro-4-((4-oxocyclohexyl)oxy)benzoic acidAusbeute 45 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 180AcetoneLösungsmittelHCID 57417360Sodium chloride; waterLösungsmittel

Versuchsvorschrift

To a solution of 4-(1,4-dioxaspiro[4.5]decan-8-yloxy)-5-chloro-2-fluorobenzoic acid (2.95 g, 8.92 mmol) in acetone (100 mL) was added 3 M hydrochloric acid (80 mL). The solution was heated to reflux for 17 hours and cooled to ambient temperature. The mixture was diluted with brine (200 mL) and extracted with ethyl acetate (3×150 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo to dryness. The residue was purified by column chromatography with a gradient of a solution of 0.2% acetic acid in ethyl acetate and hexanes from 0-50% to afford the title compound as a colorless solid (1.14 g, 45%): 1H NMR (300 MHz, CDCl3) δ 8.07 (d, J=7.6 Hz, 1H), 6.77 (d, J=11.9 Hz, 1H), 4.82 (br s, 1H), 2.81-2.70 (m, 2H), 2.41-2.35 (m, 4H), 2.15-2.03 (m, 2H) (OH not observed); MS (ES−) m/z 285.1, 287.1 (M−1).

Aufarbeitung

  1. temperatureThe solution was heated
  2. temperatureto reflux for 17 hours
  3. extractionextracted with ethyl acetate (3×150 mL)
  4. dry with materialThe combined organic layers were dried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo to dryness
  7. customThe residue was purified by column chromatography with a gradient of a solution of 0.2% acetic acid in ethyl acetate and hexanes from 0-50%

Quellen und Nachweise

ORD-Eintrag
ord-897044bf85b346299e4bd12275263784
Quelldatensatz
uspto-grants-2015_02
Patentnummer
US08952169B2

Notizen zur Reaktion

Wird geladen…