CH283579A - Process for the production of a thiosemicarbazone. - Google Patents
Process for the production of a thiosemicarbazone.Info
- 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
- Authority
- CH
- Switzerland
- Prior art keywords
- parts
- weight
- thiosemicarbazone
- production
- acetylamino
- Prior art date
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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)
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) |
-
1949
- 1949-03-04 CH CH283579D patent/CH283579A/en unknown
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