Ammonia → 1-Amino-4-hydroxyanthraquinone

HRID 21818

Reaktionsgleichung

Reaktionsgleichung von HRID 21818
[OH:1][C:2]1[C:15]2[C:14](=[O:16])[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[C:7](=[O:17])[C:6]=2[C:5](O)=[CH:4][CH:3]=1.S(S([O-])=O)([O-])=O.[Na+].[Na+].[OH-].[Na+].[NH3:29]>O>[NH2:29][C:5]1[C:6]2[C:7](=[O:17])[C:8]3[C:13](=[CH:12][CH:11]=[CH:10][CH:9]=3)[C:14](=[O:16])[C:15]=2[C:2]([OH:1])=[CH:3][CH:4]=1

Komponenten

6

Edukt 4

HCID 222AmmoniaHCID 6688QuinizarinHCID 14798Sodium HydroxideHCID 24489Sodium Dithionite

Produkt 1

HCID 83231-Amino-4-hydroxyanthraquinoneAusbeute 90,7 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

79.5 g of 1,4-dihydroxyanthraquinone, 210 ml of water, 5.6 g of sodium dithionite, 60 g of 50% strength by weight sodium hydroxide solution and 240 g of 25% strength by weight ammonia solution were introduced into a pressure-resistant apparatus. The apparatus was then sealed pressure-tight and its contents were heated to 100° C., giving rise to an autogenous pressure of 2.5 bar. The reaction mixture was held under these conditions for 3 h, then cooled down and depressurized. The precipitate found was filtered off with suction, washed salt-free with water and dried to leave 74.9 g of 1-amino-4-hydroxyanthraquinone (purity according to GC: 90.7%).

Aufarbeitung

  1. customgiving rise to an autogenous pressure of 2.5 bar
  2. temperaturecooled down
  3. filtrationThe precipitate found was filtered off with suction
  4. washwashed salt-free with water
  5. customdried

Quellen und Nachweise

ORD-Eintrag
ord-45bc2107cab64c4da7c9c3ab9e396b58
Quelldatensatz
uspto-grants-1995_06
Patentnummer
US05424461

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