CH194646A - Process for the preparation of an aminodiaryl ketone. - Google Patents

Process for the preparation of an aminodiaryl ketone.

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Publication number
CH194646A
CH194646A CH194646DA CH194646A CH 194646 A CH194646 A CH 194646A CH 194646D A CH194646D A CH 194646DA CH 194646 A CH194646 A CH 194646A
Authority
CH
Switzerland
Prior art keywords
ketone
preparation
aminodiaryl
chlorobenzoyl
hydrochloric acid
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 CH194646A publication Critical patent/CH194646A/en

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Description

  

  Verfahren zur Darstellung eines     Aminodiarylketons.       Gegenstand des vorliegenden Zusatz  patentes ist ein Verfahren zur Darstellung  eines     Aminodiarylketons,    welches dadurch  gekennzeichnet ist, dass man     p-Chlorbenzoyl-          chlorid    in Gegenwart von Aluminiumchlorid  auf     2-Acetylamino-5,6,7,8-tetrahydronaph-          thalin    einwirken lässt     (Friedel-Crafts'sche     Reaktion) und in dem so erhaltenen Beton  die     Acetaminogruppe    zur     Aminogruppe    ver  seift.  



       Beispiel:     30 Gewichtsteile aromatisches     2-Acetyl-          amino-5,6,7,8-tetrahydronaphthalin    (Annalen  426 [1922], Seite 59) werden mit 50 Ge  wichtsteilen     p-Chlorbenzoylchlorid    in 250  Raumteilen trockenem Schwefelkohlenstoff  verrührt und mit 200 Gewichtsteilen     ge-          pulvertem        Aluminiumchlorid    nach und nach  versetzt. Nach einstündigem     Nachrühren     bei gewöhnlicher Temperatur wird auf dem  Wasserbad bis zum Nachlassen der Salz  säureentwicklung erwärmt.

   Man destilliert    hierauf den Schwefelkohlenstoff ab und zer  setzt mit Eis     und        ,Salzsäure.    Die harzig an  fallende     Acetylverbindung,    welche sich mit  gelber Farbe in     konzentrierter    Schwefelsäure  löst, wird nach dem Trocknen zur Beseiti  gung von     Chlorbenzoesäure    und Verunreini  gungen mit     Xylol    verrieben, vom Rückstand  abgesaugt und das Filtrat durch Wasser  dampfdestillation vom     Xylol    befreit.  



  Man verseift den Rückstand des Filtrates  mit der 20fachen Menge Salzsäure 1 :1 durch  drei- bis vierstündiges Kochen, wobei sich  das salzsaure Salz der Base schon     in    der  Siedehitze abzuscheiden     beginnt.     



  Wird das nach dem Abkühlen abgesaugte  salzsaure Salz durch Wasser     unter    Zugabe  von etwas Alkali zersetzt, so erhält man das  3 - p -     Chlorbenzoyl    - 2 -     aminotetrahydronaph        -          thalin,    welches aus Alkohol in     einheitlichen     gelben Stäbchen vom Schmelzpunkt 155   C  kristallisiert. Das     3-p-Chlorbenzoyl-2-amino-          tetrahydronaphthalin    ist eine neue Verbin-           dung    und soll als Zwischenprodukt für die  Herstellung von     Farbstoffen    Verwendung  finden.



  Process for the preparation of an aminodiaryl ketone. The subject of the present additional patent is a process for the preparation of an aminodiaryl ketone, which is characterized in that p-chlorobenzoyl chloride is allowed to act on 2-acetylamino-5,6,7,8-tetrahydronaphthalene in the presence of aluminum chloride (Friedel- Crafts' reaction) and in the concrete obtained in this way, the acetamino group soaps to form the amino group.



       Example: 30 parts by weight of aromatic 2-acetylamino-5,6,7,8-tetrahydronaphthalene (Annalen 426 [1922], page 59) are mixed with 50 parts by weight of p-chlorobenzoyl chloride in 250 parts by volume of dry carbon disulfide and mixed with 200 parts by weight powdered aluminum chloride gradually added. After stirring for one hour at normal temperature, the mixture is heated on the water bath until the development of hydrochloric acid subsides.

   The carbon disulfide is then distilled off and zer sets with ice and hydrochloric acid. The resinous acetyl compound, which dissolves in concentrated sulfuric acid with a yellow color, is triturated with xylene after drying to eliminate chlorobenzoic acid and impurities, suctioned off the residue and the filtrate is freed from xylene by steam distillation.



  The residue of the filtrate is saponified with 20 times the amount of hydrochloric acid 1: 1 by boiling for three to four hours, during which the hydrochloric acid salt of the base begins to separate out at the boiling point.



  If the hydrochloric acid salt sucked off after cooling is decomposed by water with the addition of a little alkali, 3 - p - chlorobenzoyl - 2 - aminotetrahydronaphthalene is obtained, which crystallizes from alcohol in uniform yellow rods with a melting point of 155 ° C. 3-p-chlorobenzoyl-2-aminotetrahydronaphthalene is a new compound and is intended to be used as an intermediate in the manufacture of dyes.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Amino- diarylketons, dadurch gekennzeichnet, dass man p-Chlorbenzoylchlorid in Gegenwart von Aluminiumchlorid auf 2-Acetylamino-5,6,7,8- tetrahydronaphthalin einwirken lässt und in dem so erhaltenen Keton die Acetamino- gruppe zur Aminogruppe verseift. PATENT CLAIM: Process for the preparation of an amino diaryl ketone, characterized in that p-chlorobenzoyl chloride is allowed to act on 2-acetylamino-5,6,7,8-tetrahydronaphthalene in the presence of aluminum chloride and the acetamino group to the amino group in the ketone thus obtained saponified. Das so erhältliche 3-p-Chlorbenzoyl-2- aminotetrahydronaphthalin kristallisiert aus Alkohol in einheitlichen gelben Stäbchen vom Schmelzpunkt 155 C. The 3-p-chlorobenzoyl-2-aminotetrahydronaphthalene thus obtainable crystallizes from alcohol in uniform yellow rods with a melting point of 155 C.
CH194646D 1934-11-20 1935-11-18 Process for the preparation of an aminodiaryl ketone. CH194646A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE194646X 1934-11-20
CH189404T 1935-11-18

Publications (1)

Publication Number Publication Date
CH194646A true CH194646A (en) 1937-12-15

Family

ID=25721780

Family Applications (1)

Application Number Title Priority Date Filing Date
CH194646D CH194646A (en) 1934-11-20 1935-11-18 Process for the preparation of an aminodiaryl ketone.

Country Status (1)

Country Link
CH (1) CH194646A (en)

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