CH141455A - Process for the preparation of an o-aminoarylrhodane compound. - Google Patents

Process for the preparation of an o-aminoarylrhodane compound.

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Publication number
CH141455A
CH141455A CH141455DA CH141455A CH 141455 A CH141455 A CH 141455A CH 141455D A CH141455D A CH 141455DA CH 141455 A CH141455 A CH 141455A
Authority
CH
Switzerland
Prior art keywords
diamino
compound
preparation
diaminoanthracene
act
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 CH141455A publication Critical patent/CH141455A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung einer     o-Aminoarylrhodanverbindung.       Vorliegendes Patent bezieht sich auf ein  Verfahren zur Darstellung von     2.6-Diamino-          1.5-dirhodananthracen    der Formel  
EMI0001.0004     
    dadurch gekennzeichnet, dass man     Rhodan     auf 2.     6-Diaminoanthracen    in Gegenwart eines  neutralen organischen Lösungsmittels einwir  ken lässt, das ein gutes     Lösungsvermögen     für mindestens einen der in Reaktion treten  den     Stoffe    besitzt.  



  Das erhaltene neue     2.6-Diamino-1.5-di-          rhodananthracen    stellt ein gelbes, amorphes  Pulver dar, das über<B>300"</B> schmilzt. Es soll  als Zwischenprodukt zur Herstellung von       Farbstoffen    Verwendung finden. Beim Be-    handeln mit alkalischen     Verseifungsmitteln     zweckmässig unter Zusatz eines Reduktions  mittels, wird die entsprechende     o-Diamirio-          dimerkaptoverbindung    erhalten, die mit Mono  chloressigsäure zur entsprechenden     Dithio-          glykolsäure    kondensiert werden kann.

      <I>Beispiel:</I>    21 Teile     2.6-Diaminoanthracen    und 64  Teile     Ammoniumrhodanid    werden mit 700  Teilen Methylalkohol angerührt und zu der  Suspension bei zirka 0   unter Rühren lang  sam eine Lösung von 36 Teilen Brom in  etwa     3"00    Teilen Methylalkohol zugefügt.  



  Nach etwa     1/2stündigem    Rühren saugt  man den entstandenen Niederschlag ab und  wäscht ihn mit verdünnter     Sodalösung    aus.



  Process for the preparation of an o-aminoarylrhodane compound. The present patent relates to a process for the preparation of 2,6-diamino-1,5-dirhodananthracene of the formula
EMI0001.0004
    characterized in that rhodane is allowed to act on 2, 6-diaminoanthracene in the presence of a neutral organic solvent which has a good solvency for at least one of the substances that react.



  The new 2,6-diamino-1,5-di-rhodananthracene obtained is a yellow, amorphous powder that melts over <B> 300 "</B>. It is said to be used as an intermediate product for the production of dyes. When treating with alkaline substances Saponification agents, expediently with the addition of a reducing agent, the corresponding o-diamiriodimercapto compound is obtained, which can be condensed with monochloroacetic acid to give the corresponding dithioglycolic acid.

      <I> Example: </I> 21 parts of 2,6-diaminoanthracene and 64 parts of ammonium rhodanide are mixed with 700 parts of methyl alcohol and a solution of 36 parts of bromine in about 300 parts of methyl alcohol is slowly added to the suspension at about 0 while stirring.



  After stirring for about 1/2 hour, the precipitate formed is suctioned off and washed out with dilute soda solution.

Claims (1)

PATENTANSPRUCH: Verfahren' zur Darstellung von 2.6-Dia- mino-1.5-dirhodananthracen der Formel. EMI0002.0001 dadurch gekennzeichnet, dass man Rhodan auf 2.6-Diaminoanthracen in Gegenwart eines neutralen organischen Lösungsmittels einwir ken lässt, das ein gutes Lösungsvermögen, für mindestens einen der in Reaktion treten den Stoffe besitzt. Das erhaltene neue 2.6-Diamino-l.5-dirho- dananthracen stellt ein gelbes, amorphes Pulver dar, das über 30011 schmilzt. Es soll als Zwischenprodukt zur Herstellung von Farbstoffen Verwendung finden. PATENT CLAIM: Process for the preparation of 2.6-diamino-1.5-dirhodananthracene of the formula. EMI0002.0001 characterized in that rhodan is allowed to act on 2,6-diaminoanthracene in the presence of a neutral organic solvent which has a good solvent power for at least one of the substances that react. The new 2.6-diamino-1.5-dirhadananthracene obtained is a yellow, amorphous powder that melts above 30011. It is said to be used as an intermediate in the manufacture of dyes. Beim Behan- deln mit alkalischen Verseifungsmitteln, zweckmässig unter Zusatz eines Reduktions mittels, wird die entsprechende o-Diamino- dimerkaptoverbindung erhalten, die mit Mono chloressigsäure zur entsprechenden Dithiogly- kolsäure kondensiert werden kann. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man ein anorganisches Rhodanid und gleichzeitig Halogen in Ge genwart eines neutralen organischen Lösungs mittels der im Patentanspruch beschriebenen Art auf 2 . 6-Diaminoanthracen einwirken lässt. When treating with alkaline saponifying agents, expediently with the addition of a reducing agent, the corresponding o-diamino dimer capo compound is obtained, which can be condensed with monochloroacetic acid to form the corresponding dithioglycolic acid. SUBClaim: Method according to claim, characterized in that an inorganic rhodanide and at the same time halogen in the presence of a neutral organic solution by means of the type described in claim 2. 6-diaminoanthracene can act.
CH141455D 1927-03-11 1928-03-09 Process for the preparation of an o-aminoarylrhodane compound. CH141455A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE141455X 1927-03-11
DE70427X 1927-04-07
CH137209T 1928-03-09

Publications (1)

Publication Number Publication Date
CH141455A true CH141455A (en) 1930-07-31

Family

ID=27177044

Family Applications (1)

Application Number Title Priority Date Filing Date
CH141455D CH141455A (en) 1927-03-11 1928-03-09 Process for the preparation of an o-aminoarylrhodane compound.

Country Status (1)

Country Link
CH (1) CH141455A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089862A (en) * 1954-09-14 1963-05-14 Shell Oil Co Polymeric reaction product of polyalkyl substituted diisocyano compounds and polyhydrxy compound

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3089862A (en) * 1954-09-14 1963-05-14 Shell Oil Co Polymeric reaction product of polyalkyl substituted diisocyano compounds and polyhydrxy compound

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