CH201955A - Process for the preparation of dehydrobinaphthylenediimine. - Google Patents

Process for the preparation of dehydrobinaphthylenediimine.

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Publication number
CH201955A
CH201955A CH201955DA CH201955A CH 201955 A CH201955 A CH 201955A CH 201955D A CH201955D A CH 201955DA CH 201955 A CH201955 A CH 201955A
Authority
CH
Switzerland
Prior art keywords
dehydrobinaphthylenediimine
preparation
amino
oxynaphthalene
parts
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 CH201955A publication Critical patent/CH201955A/en

Links

Description

  

  Verfahren zur Herstellung von     Dehydrobinaphthylendiimin.       Gegenstand des schweizerischen Patentes  196650 ist ein Verfahren zur Herstellung von       Dehydrobinaphthylendiimin,    das darin besteht,  dass man     8-Acetylamino-2-oxynaphtalin    oxy  diert und das so erhaltene     8.8'-Diacetylamino-          1.1'-binaphthon-(2.2')    einer verseifenden und  wasserabspaltenden Behandlung unterwirft.  



  Es wurde nun gefunden, dass man, aus  gehend von     8-Amino-2-oxynaphthalinen,    auf  einem weit einfacheren Wege in einem Ar  beitsgange zu dem     Dehydrobinaphthylendiimin     und seinen Derivaten gelangt, wenn man  die     Aminonaphthole    einer Behandlung mit  dehydrierenden Mitteln unterwirft.  



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung von     Dehy-          drobinaphthylendiimin,    welches dadurch ge  kennzeichnet ist, dass man     8-Amino-2-oxy-          naphthalin    in Gegenwart von     Dehydrierungs-          m;tteln    einer Wärmebehandlung unterwirft.    <I>Beispiel 1:</I>  Ein Gemisch von 100 Teilen     8-Amino-          2-oxynaphthalin,    150 Teilen Nitrobenzol und  50 Teilen Kupferoxyd wird 3 Stunden am       Rückflusskühler    gekocht.

   Dabei bildet sich  ein     Anlagerungsprodukt    des     Aminonaphthols     an     Dehydrobinaphthylendiimin,    vermengt mit  Kupferoxyd. Nach Absaugen und Trocknen  wird dieses Gemisch erhitzt und liefert dabei  das     Dehydrobinaphthylendiimin.     



  <I>Beispiel 2:</I>  10 Teile     8-Amino-2-Oxynaphthalin    werden  mit 10 Teilen Kupferoxyd gut vermischt  und auf eine solche Temperatur erhitzt, dass  Sublimation eintritt. Man erhält das     Dehy-          drobinaphthylendiimin    gleichfalls in guter  Ausbeute.  



  <I>Beispiel 3:</I>       8-Amino-2-oxyiaphtalin,    mit etwas Kup  ferbronze versetzt, gibt beim Erhitzen gleich  falls     Dehydrobinaphthylendiimin.         <I>Beispiel</I>  Eine     Zinkstaubdestillation    von     8-Amino-          2-oxynaphthalin    führt ebenfalls zum     Dehy-          drobinaphthylendiimin.     Der     Endstoff    ist mit dem nach dem Ver  fahren des Patentes Nr. 196650 erhältlichen  identisch und dient ebenfalls unter anderem  zur Herstellung von     Farbstoffen.  



  Process for the preparation of dehydrobinaphthylenediimine. The subject of the Swiss patent 196650 is a process for the production of dehydrobinaphthylenediimine, which consists in that 8-acetylamino-2-oxynaphthalene is oxy dated and the resulting 8.8'-diacetylamino-1.1'-binaphthon- (2.2 ') a saponifying and dehydrating Subject to treatment.



  It has now been found that starting from 8-amino-2-oxynaphthalenes, dehydrobinaphthylenediimine and its derivatives can be obtained in a much simpler way in one work if the aminonaphthols are subjected to treatment with dehydrating agents.



  The subject of the present patent is a process for the preparation of dehydrobinaphthylenediimine, which is characterized in that 8-amino-2-oxynaphthalene is subjected to a heat treatment in the presence of dehydration tools. <I> Example 1 </I> A mixture of 100 parts of 8-amino-2-oxynaphthalene, 150 parts of nitrobenzene and 50 parts of copper oxide is refluxed for 3 hours.

   An adduct of aminonaphthol with dehydrobinaphthylenediimine is formed, mixed with copper oxide. After filtering off with suction and drying, this mixture is heated and delivers the dehydrobinaphthylenediimine.



  <I> Example 2: </I> 10 parts of 8-amino-2-oxynaphthalene are mixed well with 10 parts of copper oxide and heated to a temperature such that sublimation occurs. The dehydrobinaphthylenediimine is also obtained in good yield.



  <I> Example 3: </I> 8-Amino-2-oxyiaphtalin, mixed with a little copper bronze, also gives dehydrobinaphthylenediimine when heated. <I> Example </I> A zinc dust distillation of 8-amino-2-oxynaphthalene also leads to dehydrobinaphthylenediimine. The end product is identical to that obtainable according to the process of patent no. 196650 and is also used, among other things, to produce dyes.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Dehydro- binaphthylendiimin, dadurch gekennzeichnet, dass man 8-Amino-2-oxynaphthalin in Gegen wart von Dehydrierungsmitteln einer Wärme behandlung unterwirft. PATENT CLAIM: Process for the preparation of dehydrobinaphthylenediimine, characterized in that 8-amino-2-oxynaphthalene is subjected to a heat treatment in the presence of dehydrating agents.
CH201955D 1936-06-13 1937-03-06 Process for the preparation of dehydrobinaphthylenediimine. CH201955A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201955X 1936-06-13

Publications (1)

Publication Number Publication Date
CH201955A true CH201955A (en) 1938-12-31

Family

ID=5768896

Family Applications (1)

Application Number Title Priority Date Filing Date
CH201955D CH201955A (en) 1936-06-13 1937-03-06 Process for the preparation of dehydrobinaphthylenediimine.

Country Status (1)

Country Link
CH (1) CH201955A (en)

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