CH298036A - Process for the preparation of a new anthrapyridine. - Google Patents

Process for the preparation of a new anthrapyridine.

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Publication number
CH298036A
CH298036A CH298036DA CH298036A CH 298036 A CH298036 A CH 298036A CH 298036D A CH298036D A CH 298036DA CH 298036 A CH298036 A CH 298036A
Authority
CH
Switzerland
Prior art keywords
new
anthrapyridine
process according
preparation
elevated temperature
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH298036A publication Critical patent/CH298036A/en

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

Description

  

  Verfahren     zur    Herstellung eines neuen     Anthrapyridins.            Ge--enstand    des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines neuen       Antl)rapyridins,    welches darin besteht, dass  man     1Mol    1     Amino-2-methyl-.l-broinanthrachi-          non    hei erhöhter Temperatur unter sauren  Bedingungen mit 1     hlol        Aeetylessigsäure-          äthylester    umsetzt.  



  Das neue     Anthrapyridin    soll als     Zwisehen-          produkt    zur Herstellung von     Parbstoffen     Verwendung finden,       Ini.    nachfolgenden Beispiel. bedeuten die  Teile     Gewiehtsteile.     



  <I>Beispiel:</I>  316 Teile     1-Amino-2-methyl-l-bi-oniaiitlira-          ehinon    werden langsam unter Rühren in ein  130  warmes Gemisch von 1000 Teilen.     Acetyl-          essigsäui#eäthylester    und 20 Teilen technischer       Alkansulfonsäure    eingetragen,     wobei        leieht-          fliieht.igc    Reaktionsprodukte durch einen       whwaehen    Luftstrom entfernt werden. Man  rührt die Masse einige Stunden bei 135   weiter und     lä.sst    dann das     (Temiseh    abkühlen.

    Das Reaktionsprodukt kristallisiert in Pris  nien aus, wird abgesaugt, mit Äthylalkohol  und     Wasser    gewaschen     Lind        getroeknet.    Das  neue     Anthrapyridin    besteht aus ora.naebrau-    neu Prismen     Lind    schmilzt bei 208 bis 210 .       Es        enthält        19,56        %        Brom        (ber.        19,-18        %).  



  Process for the preparation of a new anthrapyridine. The subject matter of the present patent is a process for the preparation of a new anti) rapyridine, which consists in mixing 1 mol of 1 amino-2-methyl-.l-broinanthraquinone at an elevated temperature under acidic conditions with 1 ml of ethyl acetate implements.



  The new anthrapyridine is to be used as an intermediate product for the manufacture of perfumes, Ini. following example. mean parts by weight.



  <I> Example: </I> 316 parts of 1-amino-2-methyl-1-bi-oniaiitlira-ehinon are slowly stirred into a 130-warm mixture of 1000 parts. Acetyl acetic acid ethyl ester and 20 parts of technical alkanesulphonic acid are added, with slight reaction products being removed by a stream of air. The mixture is stirred for a few hours at 135 and then the (Temiseh) is allowed to cool.

    The reaction product crystallizes in Pris nien, is suctioned off, washed with ethyl alcohol and water and dried. The new anthrapyridine consists of ora.naebrau- neu prisms and melts at 208 to 210. It contains 19.56% bromine (calc. 19, -18%).

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Anthrapyridins, dadurch gekennzeichnet, dass man 1 -.Hol 1-Amino-2-methyl-4-bromatithra- chinon bei erhöhter Temperatur unter sauren Bedingungen mit 1 llol Acetylessigsäure- ä.thylester umsetzt, Das neue Anthrapyridin besteht aus orangebraunen Prismen und schmilzt bei 208 bis 210 . Es enthält 19, PATENT CLAIM: Process for the production of a new anthrapyridine, characterized in that 1-hol 1-amino-2-methyl-4-bromatithra- quinone is reacted at elevated temperature under acidic conditions with 1 llol ethyl acetate, the new anthrapyridine consists of orange-brown prisms and melts at 208 to 210. It contains 19, 56 % Brom (ber. 19,480/0. <B>UNTERANSPRÜCHE:</B> 1. Verfahren gemäss Patentanspruch, da durch gekennzeichnet, dass man als erhöhte Temperatur eine solche von 135 wählt. 2. Verfahren gemäss Patentanspruch, da- dureh gekennzeichnet, da.ss man die sauren Bedingungen durch Zusatz einer technischen Alkansulfonsäure zur Reaktionsmasse schafft.. 56% bromine (calc. 19.480 / 0. <B> SUBClaims: </B> 1. Process according to patent claim, characterized in that the elevated temperature selected is 135. 2. Process according to patent claim, characterized thereby , that the acidic conditions are created by adding a technical alkanesulfonic acid to the reaction mass. 3, Verfahren gemäss Patentanspruch, da durch gekennzeichnet, da.ss man die leicht flüchtigen Reaktionsprodukte durch Überlei ten eines schwachen Luftstromes über die Reaktionsmasse wegführt. 3, process according to claim, characterized in that the volatile reaction products are carried away by passing a weak stream of air over the reaction mass.
CH298036D 1951-07-12 1951-07-12 Process for the preparation of a new anthrapyridine. CH298036A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH295054T 1951-07-12
CH298036T 1951-07-12

Publications (1)

Publication Number Publication Date
CH298036A true CH298036A (en) 1954-04-15

Family

ID=25733560

Family Applications (1)

Application Number Title Priority Date Filing Date
CH298036D CH298036A (en) 1951-07-12 1951-07-12 Process for the preparation of a new anthrapyridine.

Country Status (1)

Country Link
CH (1) CH298036A (en)

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