Ethanol → 3-(4-Amino-3-hydroxyphenyl)-acrylic acid ethyl ester

HRID 1387451Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1387451
[CH2:1]([O:3][C:4](=[O:17])[CH:5]=[CH:6][C:7]1[CH:12]=[CH:11][C:10]([N+:13]([O-])=O)=[C:9]([OH:16])[CH:8]=1)[CH3:2].[NH4+].[Cl-].CCO>[Fe].O>[CH2:1]([O:3][C:4](=[O:17])[CH:5]=[CH:6][C:7]1[CH:12]=[CH:11][C:10]([NH2:13])=[C:9]([OH:16])[CH:8]=1)[CH3:2]

Komponenten

6

Edukt 3

HCID 702EthanolHCID 25517Ammonium ChlorideHCID 54189784Ethyl 3-hydroxy-4-nitrocinnamate

Produkt 1

HCID 540473973-(4-Amino-3-hydroxyphenyl)-acrylic acid ethyl ester

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23925IronKatalysatorHCID 962WaterLösungsmittel

Versuchsvorschrift

To a stirred suspension of 11-2 (4.64 g, 19.6 mmol), NH4Cl (524 mg, 9.8 mmol), EtOH (140 mL) and H2O (70 mL) was added iron dust (2.72 g, 48.9 mmol). The resulting yellow suspension was refluxed for 1.5 h., and then the solution was filtered while hot through celite. The filtrate was concentrated and the residue was partitioned between EtOAc and brine. The layers were separated and the EtOAc layer dried (Na2SO4) and concentrated to give 11-3 which was used without further purification in the next step.

Aufarbeitung

  1. temperatureThe resulting yellow suspension was refluxed for 1.5 h.
  2. filtrationthe solution was filtered while hot through celite
  3. concentrationThe filtrate was concentrated
  4. customthe residue was partitioned between EtOAc and brine
  5. customThe layers were separated
  6. dry with materialthe EtOAc layer dried (Na2SO4)
  7. concentrationconcentrated
  8. customto give 11-3 which
  9. customwas used without further purification in the next step

Quellen und Nachweise

ORD-Eintrag
ord-c1fab15ba21b42e3ab00c763585edd82
Quelldatensatz
uspto-grants-2001_07
Patentnummer
US06268378B1

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