Reaktionsgleichung
[Na+:1].[NH2:2][C:3]1[CH:8]=[CH:7][C:6]([N+:9]([O-:11])=[O:10])=[CH:5][C:4]=1[S:12]([O-:15])(=[O:14])=[O:13].[N+:16]([O-])([O-])=O.[Na+:20].Cl.O.O.O.[Na].[NH2:26][C:27]1[CH:28]=[C:29]2[C:34](=[CH:35][CH:36]=1)[CH:33]=[C:32]([S:37]([OH:40])(=[O:39])=[O:38])[CH:31]=[C:30]2[N+:41]([O-:43])=[O:42].[Na]>O.C(O)(=O)C>[NH2:26][C:27]1[C:28]([N:16]=[N:2][C:3]2[CH:8]=[CH:7][C:6]([N+:9]([O-:11])=[O:10])=[CH:5][C:4]=2[S:12]([OH:15])(=[O:14])=[O:13])=[C:29]2[C:34](=[CH:35][CH:36]=1)[CH:33]=[C:32]([S:37]([OH:40])(=[O:39])=[O:38])[CH:31]=[C:30]2[N+:41]([O-:43])=[O:42].[Na:1][Na:20]Komponenten
Edukt 6
Produkt 2
Reagenzien, Katalysatoren, Lösungsmittel 2
Reaktionsbedingungen
- Temperatur
- 0 °C
Versuchsvorschrift
A solution of 12.0 g of 2-amino-5-nitrobenzenesulfonic acid sodium salt and 3.5 g of sodium nitrate in 80 ml of water is added to a mixture of 125 ml of crushed ice, 12.5 ml of concentrated hydrochloric acid and 25 ml of acetic acid in an ice-salt bath. The mixture is stirred for approximately 15 minutes then 15.2 g of sodium trihydrate in 25 ml of water is added. This is followed almost immediately by a solution of 14.5 g of 6-amino-4-nitro-2-naphthalenesulfonic acid, sodium salt in 100 ml of water. The mixture is allowed to cool to 0° C and is filtered and washed with a 33% aqueous solution of sodium acetate trihydrate, then with ethanol and ether to give 6-amino-4-nitro-5-(4-nitro-2-sulfophenylazo)-2-naphthalenesulfonic acid, disodium salt, a dark brown powder, as the product.
Aufarbeitung
- filtrationis filtered
- washwashed with a 33% aqueous solution of sodium acetate trihydrate
Quellen und Nachweise
- ORD-Eintrag
- ord-3c84e721728c4b8689ddc9c503ef3ddc
- Quelldatensatz
- uspto-grants-1976_12
- Patentnummer
- US03998957
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