CH291791A - Process for the preparation of a derivative of 4,4'-diamino-stilbene-disulfonic acid- (2,2 '). - Google Patents
Process for the preparation of a derivative of 4,4'-diamino-stilbene-disulfonic acid- (2,2 ').Info
- Publication number
- CH291791A CH291791A CH291791DA CH291791A CH 291791 A CH291791 A CH 291791A CH 291791D A CH291791D A CH 291791DA CH 291791 A CH291791 A CH 291791A
- Authority
- CH
- Switzerland
- Prior art keywords
- stilbene
- diamino
- preparation
- amino
- disulfonic acid
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Verfahren zur Herstellung eines Derivates der 4,4'.Diamino-stilben-disulfonsäure.(2,2'). Es wurde gefunden, dass man zu einem neuen Derivat der 4,4'-Diamino-stilben-disul- fonsäure-(2,2') gelangt, wenn man 1 Mol des Dinatriumsalzes der 4-[ (p-Methoxy-benzoyl)- t:
mino ] -4'- [ 2,4-dichlor-1,3, 5-triazyl- (6) -amino ] -stilben-clisulfonsäure-(2,2') mit 2 Mol Mono- iiieth,#-lanilin umsetzt.
Die Umsetzung kann zum Beispiel in der Weise vorgenommen werden, dass man in wässriger Lösung bei 80-95 unter Zugabe von kristallisiertem Natriumacetat auf 1 Mol des Dinatriumsalzes 2 Mol Monomethylanilin einwirken lässt.
Das so erhaltene neue Dinatriumsalz der 4-[ (p-Methoxy-benzoyl)-amino] -4'- [ 2,4-(iiie- thylanilido)-r1,3,5-triazyl-(6)-amino] -stilben- disulfonsäure-(2,2') der Formel
EMI0001.0031
ist ein hellgelbes, wasserlösliches Pulver. Es kann als optisches Aufhellmittel verwendet erden.
<I>Beispiel:</I> Zu 7 Teilen des Dinatriumsalzes der 4- (p-lIethoxvbenzoyl)-amino] -4'- [2,4-dichlor- 1,3,5-triazyl-(6)-amino] stilben-disulfonsäure- (?,2') (das durch Kondensation von 1 Mol des Dinatriunisalzes der 4-Amino-4'-nitro-stilben- disulfonsäure-(2,2') mit 1 Mol p-1Iethoxy- benzoylehlorid, durch anschliessende Reduk tion und Umsetzung des so erhaltenen Amins mit.
1 11o1 Cyanurehlorid hergestellt werden kann) und 150 Teilen Wasser gibt man 6 Teile Monomethylanilin hinzu. Die Tempera tur wird dann auf 40 gesteigert und 3 Std. bei dieser Temperatur gehalten. Hierauf werden 7 Teile kristallisiertes Natriumacetat zugefügt; die Temperatur wird auf 80 ge steigert, 8 Stunden bei 80-85 belassen und anschliessend auf 40 abgekühlt. Die Reak tionsmasse wird alsdann mit. N atriumcarbonat schwach alkalisch gestellt und mit Natrium- chlorid versetzt.
Das abgeschiedene Konden- sationsprodukt wird nach dem Erkalten ab filtriert, mit. Natriumchloridlösung gewaschen und schliesslich getrocknet. Das neue Pro dukt ist ein hellgelbes, in Wasser lösliches Pulver.
Process for the preparation of a derivative of 4,4'-diamino-stilbene-disulfonic acid. (2,2 '). It has been found that a new derivative of 4,4'-diamino-stilbene-disulphonic acid- (2,2 ') is obtained if 1 mol of the disodium salt of 4- [(p-methoxy-benzoyl) - t:
mino] -4'- [2,4-dichloro-1,3,5-triazyl- (6) -amino] -stilbene-clisulfonic acid- (2,2 ') with 2 moles of monohydrate, # -aniline.
The reaction can be carried out, for example, by allowing 2 moles of monomethylaniline to act on 1 mole of the disodium salt in aqueous solution at 80-95 with the addition of crystallized sodium acetate.
The new disodium salt of 4- [(p-methoxy-benzoyl) -amino] -4'- [2,4- (methylanilido) -r1,3,5-triazyl- (6) -amino] -stilbene obtained in this way - disulfonic acid- (2,2 ') of the formula
EMI0001.0031
is a light yellow, water-soluble powder. It can be used as an optical brightener.
<I> Example: </I> To 7 parts of the disodium salt of 4- (p-lethoxylbenzoyl) -amino] -4'- [2,4-dichloro-1,3,5-triazyl- (6) -amino] stilbene-disulphonic acid (?, 2 ') (which is produced by condensation of 1 mol of the dinatrium salt of 4-amino-4'-nitro-stilbene-disulphonic acid (2.2') with 1 mol of p-1-ethoxybenzoyle chloride, by subsequent Reduction and implementation of the amine thus obtained with.
11o1 cyanuric chloride can be prepared) and 150 parts of water are added to 6 parts of monomethylaniline. The temperature is then increased to 40 and held at this temperature for 3 hours. 7 parts of crystallized sodium acetate are then added; the temperature is increased to 80 ge, left at 80-85 for 8 hours and then cooled to 40. The reaction mass is then with. Made sodium carbonate slightly alkaline and mixed with sodium chloride.
The separated condensation product is filtered off after cooling, with. Washed sodium chloride solution and finally dried. The new product is a light yellow powder that is soluble in water.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH291791T | 1949-10-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH291791A true CH291791A (en) | 1953-07-15 |
Family
ID=4487569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH291791D CH291791A (en) | 1949-10-28 | 1949-10-28 | Process for the preparation of a derivative of 4,4'-diamino-stilbene-disulfonic acid- (2,2 '). |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH291791A (en) |
-
1949
- 1949-10-28 CH CH291791D patent/CH291791A/en unknown
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