CH151327A - Process for the preparation of an anthanthrone derivative. - Google Patents

Process for the preparation of an anthanthrone derivative.

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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
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH151327A publication Critical patent/CH151327A/en

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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)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen Anthanthronderivates, dadurch gekennzeich net, dass man Methoxyanthanthron, das durch Methylieren des nach dem Verfahren des Schweiz. Patentes Nr. 143992 erhältlichen Mo nooxyanthanthrons erhalten werden kann; -mit einem bromierend wirkenden Mittel behandelt. Der neue Farbstoff ist ein Monobrommono- methoxyanthanthron. Er löst sich in Schwe- felsäure mit grüner Farbe und liefert aus rot violetter Küpe auf -Baumwolle echte rote Färbungen. PATENT CLAIM: Process for the preparation of a new anthanthrone derivative, characterized in that one methoxyanthanthrone, which is obtained by methylating according to the Swiss process. Patent No. 143992 available monooxyanthanthrons can be obtained; -treated with a brominating agent. The new dye is a monobromo monomethoxyanthanthrone. It dissolves in sulfuric acid with a green color and produces real red colors from a red-violet vat on cotton.
CH151327D 1928-10-19 1929-09-04 Process for the preparation of an anthanthrone derivative. CH151327A (en)

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)

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