Methyl 5-nitrothiophene-3-carboxylate → Methyl 5-aminothiophene-3-carboxylate

HRID 450031

Reaktionsgleichung

Reaktionsgleichung von HRID 450031
[CH3:1][O:2][C:3]([C:5]1[CH:9]=[C:8]([N+:10]([O-])=O)[S:7][CH:6]=1)=[O:4]>C(O)(=O)C.[Fe]>[CH3:1][O:2][C:3]([C:5]1[CH:9]=[C:8]([NH2:10])[S:7][CH:6]=1)=[O:4]

Komponenten

4

Edukt 1

HCID 2740231Methyl 5-nitrothiophene-3-carboxylate

Produkt 1

HCID 18983626Methyl 5-aminothiophene-3-carboxylateAusbeute 24 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23925IronKatalysatorHCID 176Acetic AcidLösungsmittel

Versuchsvorschrift

To a solution of 5-nitro-thiophene-3-carboxylic acid methyl ester (0.5 g, 2.67 mmol) in aqueous acetic acid (5 ml) was added iron powder (1.04 g, 18.6 mmol) and the reaction mixture was heated to reflux for 3 hr. The reaction mixture was filtered and triethylamine was added to the filtrate. The compound was extracted with ethyl acetate and the organic layer was washed with water, concentrated and dried to yield crude compound. The compound was purified by silica gel column chromatography, using ethyl acetate/hexane as eluent, to yield 5-amino-thiophene-3-carboxylic acid methyl ester (0.1 g, 24%).

Aufarbeitung

  1. temperaturethe reaction mixture was heated
  2. temperatureto reflux for 3 hr
  3. filtrationThe reaction mixture was filtered
  4. additiontriethylamine was added to the filtrate
  5. extractionThe compound was extracted with ethyl acetate
  6. washthe organic layer was washed with water
  7. concentrationconcentrated
  8. customdried
  9. customto yield crude compound
  10. customThe compound was purified by silica gel column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-8665354c5f57499a8919b68a4dabffcf
Quelldatensatz
uspto-grants-2013_07
Patentnummer
US08486962B2

Verknüpfte Notizen

Wird geladen…