Reaktion #65771

Reaktionsgleichung

3,4-diethoxycarbonyl-2-fluoro-5-nitro-6-phenylpyridine

acetic acid

→

3-Amino-6-fluoro-4,5-diethoxycarbonyl-2-phenylpyridine

Lösungsmittel

ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwas added to the solution
2. 2
   TemperaturAfter the mixture was refluxed for 30 minutes
3. 3
   workup.DISTILLATIONthe solvent was distilled off
4. 4
   Extraktionfollowed by extraction with ethyl acetate
5. 5
   SonstigeAfter the precipitate was removed by filtration
6. 6
   Waschenthe obtained organic layer was washed with water
7. 7
   Trocknena saturated aqueous solution of sodium chloride, and dried
8. 8
   workup.DISTILLATIONThen, the solvent was distilled off

Vorschrift

In 5 ml of ethanol was dissolved 160 mg of 3,4-diethoxycarbonyl-2-fluoro-5-nitro-6-phenylpyridine, and 120 mg (5 eq.) of reduced iron was added to the solution, followed by addition of 0.5 ml (20 eq.) of acetic acid. After the mixture was refluxed for 30 minutes, the solvent was distilled off. The residue was neutralized with sodium hydrogencarbonate, followed by extraction with ethyl acetate. After the precipitate was removed by filtration, the obtained organic layer was washed with water and a saturated aqueous solution of sodium chloride, and dried. Then, the solvent was distilled off.

Quelle