Hydrochloric Acid → 2-Chloro-5-fluoro-6-oxo-1,6-dihydropyridine-3-carboxylic acid

HRID 421922Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 421922
[Cl:1][C:2]1[N:10]=[C:9](Cl)[C:8]([F:12])=[CH:7][C:3]=1[C:4]([OH:6])=[O:5].[OH-:13].[Na+].Cl>>[Cl:1][C:2]1[NH:10][C:9](=[O:13])[C:8]([F:12])=[CH:7][C:3]=1[C:4]([OH:6])=[O:5]

Komponenten

4

Edukt 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 27336592,6-Dichloro-5-fluoronicotinic acid

Produkt 1

HCID 534406372-Chloro-5-fluoro-6-oxo-1,6-dihydropyridine-3-carboxylic acidAusbeute 47 %

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

A mixture of 2,6-dichloro-5-fluoronicotinic acid (15.00 g, 71.43 mmol, Lancaster Synthesis) and 2 N NaOH (178.6 ml, 357.2 mmol) was stirred at reflux for 2 hours and then at room temperature for 16 hours. The reaction mixture was cooled to 0° C. and acidified with 12 N HCl (32.74 ml, 392.9 mmol). The mixture was cooled for 30 minutes in an ice bath, the solid filtered and washed with H2O. The isolated solid was slurried in warm EtOH, filtered and then washed with warm EtOH. The solids were collected and dried under vacuum overnight to yield the desired product (6.4 g, 47%) as a beige solid.

Aufarbeitung

  1. temperatureat reflux for 2 hours
  2. temperatureThe mixture was cooled for 30 minutes in an ice bath
  3. filtrationthe solid filtered
  4. washwashed with H2O
  5. filtrationfiltered
  6. washwashed with warm EtOH
  7. customThe solids were collected
  8. customdried under vacuum overnight

Quellen und Nachweise

ORD-Eintrag
ord-c31d6a71400e48a8843503a4442c0031
Quelldatensatz
uspto-grants-2012_01
Patentnummer
US08101611B2

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