CH127701A - Process for the preparation of a ring ketone of the aromatic series. - Google Patents

Process for the preparation of a ring ketone of the aromatic series.

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Publication number
CH127701A
CH127701A CH127701DA CH127701A CH 127701 A CH127701 A CH 127701A CH 127701D A CH127701D A CH 127701DA CH 127701 A CH127701 A CH 127701A
Authority
CH
Switzerland
Prior art keywords
preparation
aromatic series
ring ketone
ring
ketone
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 CH127701A publication Critical patent/CH127701A/en

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Description

  

  Verfahren zur     Darstellung    eines     Ringketons    der aromatischen Reihe.    Gegenstand dieses Patentes ist ein Ver  fahren zur Darstellung eines     Ringketons    der  aromatischen Reihe von nachstehender For  mel:  
EMI0001.0004     
    welches dadurch     gekennzeichnet    ist, dass man       ,B-Chlorpropionylchlorid    mit     a-Methylnaph-          talin    und Aluminiumchlorid kondensiert  und das erhaltene Kondensationsprodukt mit  konzentrierter Schwefelsäure     erwärmt.    Das  Produkt soll zur Herstellung von Farbstoffen  Verwendung finden.  



  <I>Beispiel:</I>  Eine Lösung von 14,2 Gewichtsteilen     a-          Methylnaphtalin    und 12,7 Gewichtsteilen     ,B-          Chlorpropionylchlorid    wird unter Kühlung  mit Eiswasser zu einer     Aufschlemmung    von    30 Gewichtsteilen Aluminiumchlorid in 100  Raumteilen Schwefelkohlenstoff nach und  nach gegeben. Nach Beendigung der Um  setzung wird mit Eis und Salzsäure versetzt  und die wässerige Flüssigkeit     ausgeäthert.     Der Ätherauszug wird mit der Schwefel  kohlenstofflösung vereinigt und abgedampft.  Es     hinterbleibt    eine Kristallmasse, die aus       Ligroin    umkristallisiert werden kann.

   Das so  erhaltene 1-     Methyl    -     (ss    -     Chlorpropionyl)        -4-          naphtalin    schmilzt bei<B>60'.</B> Wird es in  konzentrierter Schwefelsäure gelöst und eine  halbe Stunde lang auf dem Wasserbade er  hitzt, so entweicht Salzsäure, und beim Ein  giessen in Wasser scheidet sich das     5-Methyl-          6.        7-benzo-l-indanon        aus,        das        bei        133              schmilzt.



  Process for the preparation of a ring ketone of the aromatic series. The subject of this patent is a process for the preparation of a ring ketone of the aromatic series of the following formula:
EMI0001.0004
    which is characterized in that B-chloropropionyl chloride is condensed with α-methylnaphthalene and aluminum chloride and the condensation product obtained is heated with concentrated sulfuric acid. The product is intended to be used for the manufacture of dyes.



  <I> Example: </I> A solution of 14.2 parts by weight of a-methylnaphthalene and 12.7 parts by weight of B-chloropropionyl chloride is gradually added to a slurry of 30 parts by weight of aluminum chloride in 100 parts by volume of carbon disulfide while cooling with ice water. When the reaction is complete, ice and hydrochloric acid are added and the aqueous liquid is extracted with ether. The ether extract is combined with the carbon disulfide solution and evaporated. What remains is a mass of crystals that can be recrystallized from ligroin.

   The 1- methyl - (ss - chloropropionyl) -4- naphthalene obtained in this way melts at <B> 60 '. </B> If it is dissolved in concentrated sulfuric acid and heated for half an hour in the water bath, hydrochloric acid escapes, and when pouring into water, the 5-methyl-6,7-benzo-l-indanone separates out, which melts at 133.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Ring ketons der aromatischen Reihe von nach stehender Formel: EMI0002.0001 dadurch gekennzeichnet, dass man ss-Chlorpro- pionylchlorid mit a-Methylnaphtalin und Aluminiumchlorid in Gegenwart von Lö- sungsmitteln kondensiert und das erhaltene Kondensationsprodukt mit konzentrierter Schwefelsäure erwärmt. Das so erhaltene Ringketon schmilzt bei<B>IM',</B> ist farblos und in Wasser unlöslich. Das Produkt soll zur Herstellung von Farbstoffen Verwendung finden. PATENT CLAIM: Process for the preparation of a ring ketone of the aromatic series of the following formula: EMI0002.0001 characterized in that β-chloropropionyl chloride is condensed with α-methylnaphthalene and aluminum chloride in the presence of solvents and the condensation product obtained is heated with concentrated sulfuric acid. The ring ketone obtained in this way melts at <B> IM ', </B> is colorless and insoluble in water. The product is intended to be used for the manufacture of dyes.
CH127701D 1926-03-26 1927-03-14 Process for the preparation of a ring ketone of the aromatic series. CH127701A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE127701X 1926-03-26
CH126404T 1927-03-14

Publications (1)

Publication Number Publication Date
CH127701A true CH127701A (en) 1928-09-01

Family

ID=25710649

Family Applications (1)

Application Number Title Priority Date Filing Date
CH127701D CH127701A (en) 1926-03-26 1927-03-14 Process for the preparation of a ring ketone of the aromatic series.

Country Status (1)

Country Link
CH (1) CH127701A (en)

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