CH151327A - Process for the preparation of an anthanthrone derivative. - Google Patents
Process for the preparation of an anthanthrone derivative.Info
- Publication number
- CH151327A CH151327A CH151327DA CH151327A CH 151327 A CH151327 A CH 151327A CH 151327D A CH151327D A CH 151327DA CH 151327 A CH151327 A CH 151327A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- anthanthrone
- derivative
- anthanthrone derivative
- sulfuric acid
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Anthanthronderivates. Es wurde gefunden, dass man ein wert volles Anthanthronderivat erhalten kann, wenn man Methoxyanthanthron, das durch Methy- lieren des nach dem Verfahren des schweiz. Patentes Nr. 143992 erhältlichen Monooxy- anthanthrons erhalten werden kann, mit einem bromierend wirkenden Mittel behandelt.
Der neue Farbstoff ist ein Monobrommono- metboxyanthanthron. Er löst sich in Schwe felsäure mit grüner Farbe und liefert aus rot violetter Hüpe auf Baumwolle echte rote Färbungen. <I>Beispiel:</I> 33,6 Gewichtsteile Methoxyanthanthron werden bei 0 C in 330 Gewichtsteilen Chlor sulfonsäure gelöst. Die grüne Lösung wird nach Zugabe von 3 Gewichtsteilen Jod mit 16 Gewichtsteilen Brom versetzt, ungefähr 1 Stunde lang bei 0 C belassen und zur Be endigung der Reaktion 1 Stunde lang bei ge wöhnlicher Temperatur gerührt. Nach dem Verdünnen mit Schwefelsäure giesst man auf Eis, saugt ab und arbeitet in der üblichen Weise auf.
Die Einführung von Brom kann auch nach andern bekannten Methoden in Anwesenheit organischer Lösungsmittel, wie Nitro- oder Trichlorbenzol, erfolgen.
Die Reinigung des neuen Farbstoffes, der ein Monobrommonomethoxyänthanthroti dar stellt, kann erfordlichenfalls durch Umkristal- lisieren aus hochsiedenden organischen Lö sungsmitteln, wie Nitrobenzol, oder über das sich aus wasserhaltiger Schwefelsäure ab scheidende Sulfat oder durch Behandeln in Pastenform mit Oxydationsmitteln, wie Na- triumhypochlorit, erfolgen.
Process for the preparation of an anthanthrone derivative. It has been found that a valuable anthanthrone derivative can be obtained if methoxyanthanthrone, which is obtained by methylating it using the Swiss method. Patent No. 143992 available monooxyanthanthrons can be obtained, treated with a brominating agent.
The new dye is a monobromo monometboxyanthanthrone. It dissolves in sulfuric acid with a green color and turns red-violet hips on cotton into real red dyes. <I> Example: </I> 33.6 parts by weight of methoxyanthanthrone are dissolved in 330 parts by weight of chlorosulfonic acid at 0 ° C. After adding 3 parts by weight of iodine, 16 parts by weight of bromine are added to the green solution, the mixture is left at 0 C for about 1 hour and, to end the reaction, is stirred for 1 hour at ordinary temperature. After dilution with sulfuric acid, it is poured onto ice, filtered off with suction and worked up in the usual way.
The introduction of bromine can also be carried out by other known methods in the presence of organic solvents, such as nitrobenzene or trichlorobenzene.
The purification of the new dye, which is a monobrommonomethoxyänthanthroti, can if necessary by recrystallization from high-boiling organic solvents such as nitrobenzene, or via the sulphate which separates out of hydrous sulfuric acid or by treatment in paste form with oxidizing agents such as sodium hypochlorite, respectively.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE151327X | 1928-10-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH151327A true CH151327A (en) | 1931-12-15 |
Family
ID=5674403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH151327D CH151327A (en) | 1928-10-19 | 1929-09-04 | Process for the preparation of an anthanthrone derivative. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH151327A (en) |
-
1929
- 1929-09-04 CH CH151327D patent/CH151327A/en unknown
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