CH218517A - Process for the preparation of 1-methyl-4-phenyl-piperidyl-4-isopropyl-ketone. - Google Patents

Process for the preparation of 1-methyl-4-phenyl-piperidyl-4-isopropyl-ketone.

Info

Publication number
CH218517A
CH218517A CH218517DA CH218517A CH 218517 A CH218517 A CH 218517A CH 218517D A CH218517D A CH 218517DA CH 218517 A CH218517 A CH 218517A
Authority
CH
Switzerland
Prior art keywords
piperidyl
ketone
isopropyl
phenyl
preparation
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 CH218517A publication Critical patent/CH218517A/en

Links

Landscapes

  • Hydrogenated Pyridines (AREA)

Description

  

  Verfahren zur Herstellung von     1-Hethyl-4-phenyl-piperidyl-4-isopi#opyl-keton.       Es wurde gefunden, dass die nach dem  deutschen Patent 679281 erhältlichen     4-Aryl-          piperidin-4-carbonsäurenitriledurch        "Umsetzung     mit     magnesiumorganischen    Verbindungen und  durch Zerlegung der so entstehenden Ketimid-         zwischenprodukte    mit verdünnten Säuren in  vorzüglicher Ausbeute     4-Aryl-piperidyl-4-          ketone        liefern.    Die Umsetzung     vollzieht    sich  nach dem Schema:

    
EMI0001.0011     
    
EMI0002.0001     
         (Hlg    = Halogen  R =     Kohlenwasserstoffrest).       Die neuen Verbindungen haben die bisher  bei basisch substituierten     Ketonen    noch nicht  beobachtete Eigenschaft, stark krampflösend  und gut schmerzlindernd zu     wirken    und sind  bei zugleich geringer     Giftigkeit    wertvolle Heil  mittel.  



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung von     1-lllethyl-          4-plieny        1-pipei-idyl-4-isopi-opyl-keton,    welches  dadurch gekennzeichnet ist.     dal')    man     auf          1-3Iethy        1-4-phenyl-pipei-idin-4-carbonsäure-          nitril        Isopropy        lmagnesiumh@ilogenid    einwirken  lässt und das     entstandene        Ketimidzwischen-          produkt    mit verdünnter Säure zerlegt.  



  Das     1-3letliyl-4-plienyl-piperidyl-4-isopro-          pylketon    ist ein farbloses 01 vom     Kp7          167-168'-';    das     Phosphat    ist ein farbloses  Kristallpulver vom F.     199-202'.       <I>Beispiel:

  </I>  Eine     Isopropy#lniagnesiuinbromidlösung    aus  61 Gewichtsteilen     Propylbromid    und 12 Ge  wichtsteilen     Magnesium    in 300     Crewichtsteilen     Alkohol bereitet, wird zu einer Lösung von  60     Gewichtsteilen        1--lIetliyl-4-lilienyl-piperidin-          4-carbonsäurenitril    in 100 Gewichtsteilen To  luol zugesetzt. Die auftretende Reaktions  wärme ist nicht erheblich: nach ihrem Ab  klingen wird das Gemisch auf dem Wasser  bade am absteigenden Kühler erhitzt; der  Äther destilliert ab, die     Toluollösung    wird  drei Stunden bei     Wasserbadtemperatur    ge-    halten.

   Die Zerlegung erfolgt durch Aufgiessen  auf Eis und Verrühren mit verdünnter Salz  säure, von der soviel anzuwenden ist, dass  kongosaure Reaktion auf die Dauer bestehen  bleibt. Nach Abtrennung des     Toluols    fällt  man die Base durch Übersättigen der wässe  rigen Lösung mit Ammoniak als Öl aus, nimmt  sie in Äther auf, trocknet über     Kaliumcarbonat     und destilliert. Kp<B>167--1680.</B> Die Base ist  ein farbloses 01. Das aus der Lösung der Base  in Aceton mit 1     141o1        85 G@iger    Phosphorsäure  sich abscheidende     Phosphat    ist ein farbloses  Kristallpulver vom F. 199 - 202'.

   In     Wasser     ist es ziemlich leicht löslich, die Lösung  reagiert schwach     lackmussauer.  



  Process for the preparation of 1-Hethyl-4-phenyl-piperidyl-4-isopi # opyl-ketone. It has been found that the 4-aryl-piperidine-4-carboxylic acid nitrile obtainable according to German patent 679281 is 4-aryl-piperidyl-4-ketones in excellent yield by "reaction with organomagnesium compounds and by decomposition of the ketimide intermediates thus formed with dilute acids The implementation takes place according to the scheme:

    
EMI0001.0011
    
EMI0002.0001
         (Hlg = halogen R = hydrocarbon radical). The new compounds have the property, which has not yet been observed in basic substituted ketones, of being strong antispasmodic and good analgesic and, at the same time, they are valuable medicinal products with low toxicity.



  The subject of the present patent is a process for the preparation of 1-lllethyl-4-plieny 1-pipei-idyl-4-isopi-opyl-ketone, which is characterized. that is, isopropylmagnesium halide is allowed to act on 1-3 ethyl 1-4-phenyl-pipei-idin-4-carboxylic acid nitrile and the resulting ketimide intermediate is decomposed with dilute acid.



  The 1-3letliyl-4-plienyl-piperidyl-4-isopropyl ketone is a colorless oil of bp7 167-168'- '; the phosphate is a colorless crystal powder from F. 199-202 '. <I> example:

  </I> An isopropylininagnesiuinbromide solution of 61 parts by weight of propyl bromide and 12 parts by weight of magnesium in 300 parts by weight of alcohol is added to a solution of 60 parts by weight of 1-ethyl-4-lilienyl-piperidine-4-carboxylic acid nitrile in 100 parts by weight of toluene . The heat of reaction that occurs is not significant: after it has subsided, the mixture is heated on the water bathing on the descending cooler; the ether distills off, the toluene solution is kept for three hours at water bath temperature.

   It is broken down by pouring it onto ice and stirring it with dilute hydrochloric acid, of which enough must be used that the Congo acidic reaction persists in the long term. After the toluene has been separated off, the base is precipitated as an oil by supersaturating the aqueous solution with ammonia, it is taken up in ether, dried over potassium carbonate and distilled. Kp <B> 167--1680. </B> The base is a colorless 01. The phosphate which separates out of the solution of the base in acetone with 1 141o1 85% phosphoric acid is a colorless crystal powder of the range 199-202 ' .

   It is fairly easily soluble in water, the solution reacts weakly to lackluster.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von 1-llethyl- 4-pheny 1-piperidyl-4-isopropyl-keton, dadurch gekennzeichnet, dass man auf 1-Methyl-4- plienyl-piperidin-4-carbonsäurenitril Isopropy 1- magnesiumhalogenid einwirken lässt und das entstandene Ketimidzwischenprodukt mit ver dünnter Säure zerlegt. PATENT CLAIM: Process for the preparation of 1-llethyl-4-pheny 1-piperidyl-4-isopropyl-ketone, characterized in that 1-methyl-4-plienyl-piperidine-4-carboxylic acid nitrile isopropy 1-magnesium halide is allowed to act and that resulting intermediate ketimide product decomposed with dilute acid. Das 1-111ethy1-4-phenyl-piperidyl-4-isopro- pylketon ist ein farbloses Öl vom Kp7 167-1680, das Phosphat ist ein farbloses Kristallpulver vom F. 199-2020. The 1-111ethy1-4-phenyl-piperidyl-4-isopropyl ketone is a colorless oil from Kp7 167-1680, the phosphate is a colorless crystal powder from F. 199-2020.
CH218517D 1939-03-30 1940-03-30 Process for the preparation of 1-methyl-4-phenyl-piperidyl-4-isopropyl-ketone. CH218517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE218517X 1939-03-30

Publications (1)

Publication Number Publication Date
CH218517A true CH218517A (en) 1941-12-15

Family

ID=5831353

Family Applications (1)

Application Number Title Priority Date Filing Date
CH218517D CH218517A (en) 1939-03-30 1940-03-30 Process for the preparation of 1-methyl-4-phenyl-piperidyl-4-isopropyl-ketone.

Country Status (1)

Country Link
CH (1) CH218517A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486796A (en) * 1943-06-25 1949-11-01 Ciba Pharm Prod Inc Esters of 1-alkyl-4-hydroxyphenylpiperidyl-4-ketones
US2486794A (en) * 1943-06-25 1949-11-01 Ciba Pharm Prod Inc 1-alkyl-4-(meta-hydroxyphenyl)-piperidyl-(4)-alkylketones and their production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486796A (en) * 1943-06-25 1949-11-01 Ciba Pharm Prod Inc Esters of 1-alkyl-4-hydroxyphenylpiperidyl-4-ketones
US2486794A (en) * 1943-06-25 1949-11-01 Ciba Pharm Prod Inc 1-alkyl-4-(meta-hydroxyphenyl)-piperidyl-(4)-alkylketones and their production

Similar Documents

Publication Publication Date Title
CH218517A (en) Process for the preparation of 1-methyl-4-phenyl-piperidyl-4-isopropyl-ketone.
CH240363A (en) Process for the preparation of N- (y, y-diphenyl-allyl) -piperidine.
CH222484A (en) Process for the preparation of 1-methyl-4-phenyl-piperidyl-4-propyl-ketone.
CH222731A (en) Process for the preparation of 1-methyl-4-phenyl-piperidyl-4-ethyl-ketone.
AT203495B (en) Process for the preparation of new tertiary amines
AT262990B (en) Process for the preparation of α-pyrrolidinoketones
DE858697C (en) Process for the preparation of Dicarbonsaeuredimethylolamiden
DE726431C (en) Process for the preparation of arylides from ª ‰ -ketone carboxylic acids
DE676584C (en) Process for the preparation of monoalkylaminomonoazaphenanthrenes
CH137098A (en) Process for N-alkylation with an aminoalkyl halide.
CH295836A (en) Process for the preparation of a product of the thiosemicarbazone series.
CH194997A (en) Process for the preparation of N- (γ-diethylaminopropyl) -5-amino-m-phenanthroline.
CH222485A (en) Process for the preparation of 1-methyl-4-phenyl-piperidyl-4-isobutyl-ketone.
CH240726A (en) Process for the preparation of a p-amino-benzenesulfonamide.
CH211294A (en) Process for the production of a condensation product.
CH122466A (en) Process for the preparation of 1-phenyl-2-methyl-3,4-cyclotrimethylene-5-pyrazolone.
CH194876A (en) Process for the preparation of 2 (3 &#39;, 5&#39;-Diiodo-2&#39;-B-oxethyl-4&#39;-oxypheny) - 6-iodoquinoline-4-carboxylic acid.
CH140593A (en) Process for the preparation of a condensation product of the benzodiazine series.
CH213151A (en) Process for the preparation of a derivative of 2-amino-6-methylpyridine.
CH314208A (en) Process for the preparation of a quaternary ammonium base
CH314214A (en) Process for the preparation of a quaternary ammonium salt
CH153965A (en) Process for the preparation of a 2-oxymethylbenzimidazole arsic acid.
CH211297A (en) Process for the preparation of phosphoric acid dichloride-4-sulfonamidoanilide.
CH199910A (en) Process for the preparation of N-methylsulfanilic acid-4-aminoanilide.
CH240377A (en) Process for the preparation of an acylated, aliphatic aminocarboxamide.