CH134842A - Process for the preparation of an arylaminonaphthalene derivative. - Google Patents

Process for the preparation of an arylaminonaphthalene derivative.

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Publication number
CH134842A
CH134842A CH134842DA CH134842A CH 134842 A CH134842 A CH 134842A CH 134842D A CH134842D A CH 134842DA CH 134842 A CH134842 A CH 134842A
Authority
CH
Switzerland
Prior art keywords
preparation
derivative
arylaminonaphthalene
dioxynaphthalene
oxybenzene
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 CH134842A publication Critical patent/CH134842A/en

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

Description

  

  Verfahren zur Darstellung eines     Arylaminonaphtalinderivates.       Analog dem im Hauptpatent beschriebe  nen Verfahren kann man     1.5-Di-(4'-oxyphe-          nylamino)-napbtalin    darstellen, wenn man       1.5-Dioxynaphtalin    und     4-Amino-l-oxybenzol     mit     Bisulfitlauge    im offenen oder im Druck  gefäss durch Erhitzen kondensiert.  



  <I>Beispiel:</I>  160 Teile     1.5-Dioxynaphtalin    werden in  einem verbleiten Rührkessel mit einer Lösung  von 400 Teilen     Alkalibisulfit    in 3000 Teilen  Wasser und 260 Teilen     4-Amino-l-oxybenzol     unter Druck und Rühren etwa 36 Stunden  auf 115-120   C erhitzt. Nach dem Abküh  len des Kesselinhaltes presst man das in fei  nen Kristallen ausgeschiedene     1.5-Di-(4'-          oxyphenylamin)-naphtalin    ab und wäscht es  mit heissem Wasser. Die getrocknete Ver  bindung schmilzt bei 278-280   C. Sie bildet  bronzeglänzende Blättchen; eine wässerig  alkalische Lösung, auf Papier aufgegossen,  oxydiert sich an der Luft rotviolett. Die    neue Verbindung ist ein Zwischenprodukt  für die Herstellung von Farbstoffen.



  Process for the preparation of an arylaminonaphthalene derivative. Analogously to the process described in the main patent, 1,5-di- (4'-oxyphenylamino) -napbtaline can be prepared if 1,5-dioxynaphthalene and 4-amino-1-oxybenzene are condensed with bisulfite liquor in an open or in a pressure vessel by heating.



  <I> Example: </I> 160 parts of 1,5-dioxynaphthalene are mixed with a solution of 400 parts of alkali bisulfite in 3000 parts of water and 260 parts of 4-amino-1-oxybenzene under pressure and stirring for about 36 hours in a leaded stirred kettle. 120 C heated. After the contents of the kettle have cooled down, the 1,5-di- (4'-oxyphenylamine) -naphthalene precipitated in fine crystals is pressed off and washed with hot water. The dried compound melts at 278-280 C. It forms shiny bronze flakes; an aqueous alkaline solution, poured onto paper, oxidizes red-violet in air. The new compound is an intermediate for the manufacture of dyes.

Claims (1)

PATENTANSPRVCH Verfahren zur Darstellung eines Aryl- aminonaphtalinderivates, dadureh gekenn zeichnet, dass man 1 .5-Dioxynaphtalin und 4-Amino-l-oxybenzol in Gegenwart von Bi- sulfitlauge auf höhere Temperatur erwärmt. Sie bildet bronzeglänzende Blättchen; eine wässerig alkalische Lösung, auf Papier auf gegossen, oxydiert sich an der Luft rotvio lett. Die neue Verbindung ist ein-Zwischen- produkt für die Herstellung von Farbstoffen. PATENT APPLICATION Process for the preparation of an aryl aminonaphthalene derivative, characterized by the fact that 1,5-dioxynaphthalene and 4-amino-1-oxybenzene are heated to a higher temperature in the presence of bisulfite liquor. It forms bronze-shining leaflets; an aqueous alkaline solution, poured onto paper, oxidizes itself red-violet in the air. The new compound is an intermediate product for the production of dyes. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Umsetzung unter Druck im geschlossenen Gefäss vornimmt. SUBCLAIM: Process according to claim, characterized in that the reaction is carried out under pressure in a closed vessel.
CH134842D 1926-12-13 1927-12-03 Process for the preparation of an arylaminonaphthalene derivative. CH134842A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE134842X 1926-12-13
CH132030T 1927-12-03

Publications (1)

Publication Number Publication Date
CH134842A true CH134842A (en) 1929-08-15

Family

ID=25711751

Family Applications (1)

Application Number Title Priority Date Filing Date
CH134842D CH134842A (en) 1926-12-13 1927-12-03 Process for the preparation of an arylaminonaphthalene derivative.

Country Status (1)

Country Link
CH (1) CH134842A (en)

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