CH179446A - Process for the preparation of a sulfurization product of 2-amino-3-bromo-anthraquinone. - Google Patents
Process for the preparation of a sulfurization product of 2-amino-3-bromo-anthraquinone.Info
- Publication number
- CH179446A CH179446A CH179446DA CH179446A CH 179446 A CH179446 A CH 179446A CH 179446D A CH179446D A CH 179446DA CH 179446 A CH179446 A CH 179446A
- Authority
- CH
- Switzerland
- Prior art keywords
- amino
- preparation
- soluble
- product
- anthraquinone
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Sulfurierungsproduktes des 2-Amino-3-brom- anthrachinons. Es wurde gefunden, dass man 2-Amino- 3-bromanthrachinon durch Erhitzen mit SOs- haltiger Schwefelsäure glatt sulfieren kann, wobei überraschenderweise die Sulfogruppe in den nicht substituierten gern eintritt.
Man erhält so ein neues wasserlösliches Pro dukt folgender Formel:
EMI0001.0010
Die Sulfogruppe sitzt wahrscheinlich in 6- oder 7-Stellung. Es besteht jedoch auch die Möglichkeit, dass ein Gemisch dieser Isomeren vorliegt. Das Reaktionsprodukt zieht auf Wolle gelb auf. Es soll als Aus gangsmaterial zur Darstellung von Farb stoffen verwendet werden.
<I>Beispiel</I> 50 ('f'ewichtsteile 2-Amino-3-bromaiithra- chinon trägt man unter Rühren portions- weise in 200 Gewichtsteile Oleum von 40 % SOs-(-y'ehalt ein und erwärmt so lange auf 125-130 0, bis eine Probe des Reaktions gemisches glatt wasserlöslich ist. Nach Ab kühlen auf gewöhnliche Temperatur giesst man die Reaktionsmasse in Eiswasser.
Aus der so erhaltenen Lösung kann man das Sulfurierungsprodukt entweder durch Ein dampfen im Vakuum als eine äusserst leicht lösliche Substanz abscheiden, oder man salzt es mit Chlorkalium aus, saugt ab, wäscht den Rückstand mit verdünnter Cblorkalium- lösung und trocknet.
Das so erhaltene IQ-Salz ist ein wert volles Zwischenprodukt. Es stellt ein gelb bis orangefarbiges Pulver dar, das gut in Wasser löslich ist, mit Nitrit und Säure eine Diazoverbindung liefert, die mit 2-Naphthol- natrium zu einem löslichen roten Farbstoff kuppelt.
Process for the preparation of a sulfurization product of 2-amino-3-bromo-anthraquinone. It has been found that 2-amino-3-bromoanthraquinone can be sulfated smoothly by heating with SO 3 -containing sulfuric acid, the sulfo group surprisingly readily entering into the unsubstituted.
This gives a new water-soluble product with the following formula:
EMI0001.0010
The sulfo group is probably in the 6- or 7-position. However, there is also the possibility that a mixture of these isomers is present. The reaction product picks up yellow on wool. It should be used as a starting material for the representation of dyes.
<I> Example </I> 50 ('f' parts by weight of 2-amino-3-bromoaiithraquinone are added in portions to 200 parts by weight of oleum with 40% SO 2 content while stirring and heated up for a long time 125-130 °, until a sample of the reaction mixture is completely soluble in water After cooling to the usual temperature, the reaction mass is poured into ice water.
The sulfurization product can be separated from the solution obtained in this way either by evaporation in vacuo as an extremely easily soluble substance, or it is salted out with potassium chloride, filtered off with suction, the residue washed with dilute potassium chloride solution and dried.
The IQ salt obtained in this way is a valuable intermediate product. It is a yellow to orange-colored powder that is readily soluble in water. With nitrite and acid, it produces a diazo compound that couples with sodium 2-naphthol to form a soluble red dye.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH179446T | 1934-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH179446A true CH179446A (en) | 1935-09-15 |
Family
ID=4429263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH179446D CH179446A (en) | 1934-11-02 | 1934-11-02 | Process for the preparation of a sulfurization product of 2-amino-3-bromo-anthraquinone. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH179446A (en) |
-
1934
- 1934-11-02 CH CH179446D patent/CH179446A/en unknown
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