CH156310A - Process for the preparation of 1.2.5.6-diphtaloylnaphthalene. - Google Patents

Process for the preparation of 1.2.5.6-diphtaloylnaphthalene.

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Publication number
CH156310A
CH156310A CH156310DA CH156310A CH 156310 A CH156310 A CH 156310A CH 156310D A CH156310D A CH 156310DA CH 156310 A CH156310 A CH 156310A
Authority
CH
Switzerland
Prior art keywords
diphtaloylnaphthalene
preparation
dibenzoylnaphthalene
subsides
heated
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 CH156310A publication Critical patent/CH156310A/en

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Description

  

  Verfahren zur     DarsteHung    von     1.2.5.6-1)iphtaloylnaphtalin.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung von     1.2.5.6-Di-          phtaloylnaphtalin,    dadurch gekennzeichnet,       dass    man<B>1.</B>     5-Dibenzoylnaphtalin-2.6-diearbon-          säurechlorid    bis zum Nachlassen der     Salzsäure-          entwicklung    auf zirka 330-3400<B>0</B> erhitzt.

    <I>Beispiel:</I>       1.5-Dibenzoylnaphtalin-2.6-dicarbonsäure-          chlorid    wird bis zum Nachlassen der     Salz-          säureentwicklung    auf zirka     330-340        C    er  hitzt. Die erhaltene gelbe Schmelze ist rohes       1.2.5.6-Diphtaloylnaphtalin,    das sich durch         Umkristallisieren    aus organischen Mitteln in  reiner Form erhalten     lässt.  



  Process for the preparation of 1.2.5.6-1) iphtaloylnaphtalin. The subject of this additional patent is a method for the preparation of 1.2.5.6-diphtaloylnaphthalene, characterized in that <B> 1. </B> 5-dibenzoylnaphthalene-2.6-diarboxylic acid chloride is used until the evolution of hydrochloric acid subsides to about 330 -3400 <B> 0 </B> heated.

    <I> Example: </I> 1.5-dibenzoylnaphthalene-2.6-dicarboxylic acid chloride is heated to around 330-340 C until the development of hydrochloric acid subsides. The yellow melt obtained is crude 1,2,5,6-diphtaloylnaphthalene, which can be obtained in pure form by recrystallization from organic agents.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung von 1.2.5.6- Diphtaloylnaphtalin, dadurch gekennzeichnet, dass man<B>1.</B> 6-Dibenzoylnaphtalin-2.6-diearboii- säurechlorid bis zum Nachlassen der Salzsäure- entwicklung auf zirka 330-340' <B>C</B> erhitzt. <B> PATENT CLAIM: </B> Process for the preparation of 1.2.5.6-diphtaloylnaphthalene, characterized in that <B> 1. </B> 6-dibenzoylnaphthalene-2.6-diearboic acid chloride is used until the development of hydrochloric acid subsides about 330-340 '<B> C </B> heated.
CH156310D 1930-01-31 1931-01-23 Process for the preparation of 1.2.5.6-diphtaloylnaphthalene. CH156310A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE156310X 1930-01-31
CH154168T 1931-01-23

Publications (1)

Publication Number Publication Date
CH156310A true CH156310A (en) 1932-07-31

Family

ID=25716373

Family Applications (1)

Application Number Title Priority Date Filing Date
CH156310D CH156310A (en) 1930-01-31 1931-01-23 Process for the preparation of 1.2.5.6-diphtaloylnaphthalene.

Country Status (1)

Country Link
CH (1) CH156310A (en)

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