CH127702A - 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
CH127702A
CH127702A CH127702DA CH127702A CH 127702 A CH127702 A CH 127702A CH 127702D A CH127702D A CH 127702DA CH 127702 A CH127702 A CH 127702A
Authority
CH
Switzerland
Prior art keywords
preparation
aromatic series
ring ketone
ketone
concentrated sulfuric
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 CH127702A publication Critical patent/CH127702A/en

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Description

  

  Verfahren zur Darstellung eines     Ringketons    der aromatischen Reihe.    Gegenstand dieser Erfindung ist ein Ver  fahren zur Darstellung eines     Ringketons    der  aromatischen Reihe von nachstehender  Formel:  
EMI0001.0003     
    welches dadurch gekennzeichnet ist, dass man       ss-Chlorbuttersäurechlorid    mit     a-Methylnaph-          talin    und Aluminiumchlorid kondensiert und  das erhaltene Kondensationsprodukt mit kon  zentrierter Schwefelsäure erwärmt. Das  Produkt soll zur Herstellung von Farb  stoffen Verwendung finden.

           Beispiel:     Eine Lösung von 14,2 Gewichtsteilen a  MethyInaphtalin und 14,1     Gewichtsteilen    ss-         Chlorbuttersäurechlorid    wird unter Kühlung  mit Eiswasser zu einer     Aufschwemmung    von  30 Gewichtsteilen Aluminiumchlorid in 100  Gewichtsteilen Schwefelkohlenstoff nach und  nach gegeben. Nach     Beendigung    der Um  setzung wird mit Eis und Salzsäure ver  setzt und die wässerige Flüssigkeit     ausge-          äthert.    Der Ätherauszug wird mit der     Schwe-          felkohlenstofflösung    vereinigt und abge  trennt.

   Es     hinterbleibt    eine Kristallmasse,  die aus     Ligroin    umkristallisiert werden kann.  Das so erhaltene     1-Methyl-(ss-chlorbutyryl)-          4-naphtalin    vom Schmelzpunkt 44 bis 45'  wird hierauf mit konzentrierter Schwefel  säure bei<B>100'</B> einige Zeit     digeriert.    Sodann  gibt man auf Wasser, wobei sich das     3,5-          Dimethyl-6.        7-benzo-l-indanon    vom Schmelz  punkt 67 bis<B>68'</B> abscheidet.



  Process for the preparation of a ring ketone of the aromatic series. The subject of this invention is a process for the preparation of a ring ketone of the aromatic series of the following formula:
EMI0001.0003
    which is characterized in that β-chlorobutyric acid 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 in the manufacture of dyes.

           Example: A solution of 14.2 parts by weight of a methyl naphthalene and 14.1 parts by weight of s-chlorobutyric acid chloride is gradually added to a suspension of 30 parts by weight of aluminum chloride in 100 parts by weight 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 sulphide solution and separated off.

   What remains is a crystal mass that can be recrystallized from ligroin. The 1-methyl- (ß-chlorobutyryl) -4-naphthalene obtained in this way with a melting point of 44 to 45 'is then digested with concentrated sulfuric acid at <B> 100' </B> for some time. It is then added to water, the 3,5-dimethyl-6. 7-benzo-l-indanone from melting point 67 to <B> 68 '</B> separates.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Ring ketons der aromatischen Reihe von folgender Formel: EMI0002.0001 dadurch gekennzeichnet, dass man ss-Chlor- buttersäurechlorid mit a-Methylnaphtalin und Aluminiumchlorid kondensiert und das er- haltene Kondensationsprodukt mit konzen trierter Schwefelsäure erwärmt. Das so er haltene PLingketon schmilzt bei 67 bis 68 , ist farblos und in Nasser 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-chlorobutyric acid chloride is condensed with α-methylnaphthalene and aluminum chloride and the condensation product obtained is heated with concentrated sulfuric acid. The pingketone obtained in this way melts at 67 to 68, is colorless and insoluble in water. The product is intended to be used for the manufacture of dyes.
CH127702D 1926-03-16 1927-03-14 Process for the preparation of a ring ketone of the aromatic series. CH127702A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE127702X 1926-03-16
CH126404T 1927-03-14

Publications (1)

Publication Number Publication Date
CH127702A true CH127702A (en) 1928-09-01

Family

ID=25710650

Family Applications (1)

Application Number Title Priority Date Filing Date
CH127702D CH127702A (en) 1926-03-16 1927-03-14 Process for the preparation of a ring ketone of the aromatic series.

Country Status (1)

Country Link
CH (1) CH127702A (en)

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