CH283579A - Process for the production of a thiosemicarbazone. - Google Patents

Process for the production of a thiosemicarbazone.

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Publication number
CH283579A
CH283579A CH283579DA CH283579A CH 283579 A CH283579 A CH 283579A CH 283579D A CH283579D A CH 283579DA CH 283579 A CH283579 A CH 283579A
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CH
Switzerland
Prior art keywords
parts
weight
thiosemicarbazone
production
acetylamino
Prior art date
Application number
Other languages
German (de)
Inventor
Bayer Farbenfabriken
Original Assignee
Bayer 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 Bayer Ag filed Critical Bayer Ag
Publication of CH283579A publication Critical patent/CH283579A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Description

  

  Verfahren zur Herstellung eines     Thiosemicarbazons.       Vertreter der     Thiosemicarbazone        eveliseher          .1lcleliyde,    wie z. B. das     p-Aeet.ylamino-benzal-          thioseinicarbazon,    stellen bekanntlich wert  volle therapeutische Produkte dar. Diese Ver  bindungen wurden bisher hergestellt, indem       inan        Thiosemiearbazide    mit den entsprechen  den     cyelischen    Aldehyden oder Derivaten die  ser Aldehyde umsetzt.  



       E.s    wurde nun gefunden,     da13    man zum       p-Aeet;ylamino-benzalthiosemicarbazon    auch       gelangen    kann, wenn man     p-Acetyiamino-          benzaldehvd    mit dem     Thiosemicarbazon    eines       Ketons    umsetzt. Diese neue Reaktion     besitzt          1t.    a. wegen der oben erwähnten Eigenschaften  des p -     Acetylamino    -     benzalthiosemicarbazons     grosse technische Bedeutung.

   Ausserdem ist sie  gegenüber dem bisher angewendeten Verfah  ren zur Herstellung von     Thiosemicarbazonen          cyelischer    Aldehyde vorteilhafter, da die     Thio-          seniiearbazone    von     Ketonen    leichter     zugäng-          lieh    sind als das bisher eingesetzte     Thiosemi-          carbazid.    Die     Thiosemicarbazone    der     Ketone     lassen sich z.

   B. in einfacher Weise durch Um  setzen von     Hyclrazinrhodanid    mit     Ketonen    in  der Wärme herstellen (vgl.     Sehweizer    Patent       Nr.        ?78584).     



       Beispiel.   <I>1:</I>  8,5 Gewichtsteile     Aceton-Thiosemiearbazon          werden        in        85        Gewiehtsteilen        30        %        iger    Essig-    säure gelöst und zusammen mit einer Lösung  von 8     Gewiehtsteilen        p-Acety lamino-benzalde-          hyd    in 150     Gewiehtsteilen    Methanol kurze Zeit  erwärmt.

   Es scheidet sich das     p-Acetylamino-          benzalthiosemicarbazon    ab, das nach dem Ab  kühlen in einer Ausbeute von 7,5 Gewichts  teilen isoliert wird.  



  <I>Beispiel 2:</I>  3,4 Gewichtsteile     Cyclohexanon-thiosemi-          carbazon    werden in 70     Clewichtsteilen        50o/oiger     Essigsäure heiss gelöst und mit einer     Lösungvon     <B>3</B>     ,2        CT        ewiehtsteilen        p-Aeet#-Iamino-beiizaldehyd     in 50     Gewiehtsteilen    Wasser einige Zeit. zum  Sieden erhitzt. Nach dem Erkalten werden  durch Absaugen 3,6 Gewichtsteile des     p-Ace-          tvlamino-benzalthiosemicarbazons    erhalten.  



  Schmelzpunkt     naeh    der Umlösung aus     Me-          thanol-Natronlauge    = 233 .



  Process for the production of a thiosemicarbazone. Representatives of the thiosemicarbazones eveliseher .1lcleliyde, such as. B. p-Aeet.ylamino-benzal thioseinicarbazone, are known to be valuable therapeutic products. These compounds have so far been produced by inan thiosemic arbazides with the corresponding cyelic aldehydes or derivatives of these aldehydes.



       It has now been found that p-acetylamino-benzalthiosemicarbazone can also be obtained by reacting p-acetyiamino-benzaldehyde with the thiosemicarbazone of a ketone. This new reaction has 1t. a. because of the above-mentioned properties of p-acetylamino-benzalthiosemicarbazone, it is of great industrial importance.

   In addition, it is more advantageous compared to the previously used process for the production of thiosemicarbazones of cyelic aldehydes, since the thiosemicarbazones of ketones are more easily accessible than the thiosemicarbazide previously used. The thiosemicarbazones of the ketones can be z.

   B. in a simple manner by to put Hyclrazinrhodanid with ketones in the heat (see. Sehweizer Patent No.? 78584).



       Example. <I> 1: </I> 8.5 parts by weight of acetone thiosemiearbazone are dissolved in 85 parts by weight of 30% acetic acid and heated for a short time together with a solution of 8 parts by weight of p-acetylamino-benzaldehyde in 150 parts by weight of methanol .

   It separates from the p-acetylamino benzalt thiosemicarbazone, which is isolated after cooling from parts in a yield of 7.5 parts by weight.



  <I> Example 2: </I> 3.4 parts by weight of cyclohexanone thiosemicarbazone are dissolved in 70 parts by weight of 50% acetic acid and mixed with a solution of <B> 3 </B>, 2 parts by weight of p-acetone # - Iamino-beiizaldehyde in 50 parts by weight of water for some time. heated to boiling. After cooling, 3.6 parts by weight of the p-acetvlamino-benzalthiosemicarbazone are obtained by suction.



  Melting point after dissolution from methanol-sodium hydroxide solution = 233.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von p-Acetyl- amino-benzalthiosemicarbazon, dadurch ge kennzeichnet, dass man p-Acetylaminobenz- aldehy d mit. dem Thiosemicarbazon eines Ketons umsetzt. PATENT CLAIM: Process for the production of p-acetylamino-benzalthiosemicarbazone, characterized in that p-acetylaminobenzaldehyde is d with. converts the thiosemicarbazone of a ketone.
CH283579D 1949-03-04 1949-03-04 Process for the production of a thiosemicarbazone. CH283579A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH283579T 1949-03-04

Publications (1)

Publication Number Publication Date
CH283579A true CH283579A (en) 1952-06-15

Family

ID=4484157

Family Applications (1)

Application Number Title Priority Date Filing Date
CH283579D CH283579A (en) 1949-03-04 1949-03-04 Process for the production of a thiosemicarbazone.

Country Status (1)

Country Link
CH (1) CH283579A (en)

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