AT21606B - Process for the preparation of m-Tolylsemicarbazide. - Google Patents

Process for the preparation of m-Tolylsemicarbazide.

Info

Publication number
AT21606B
AT21606B AT21606DA AT21606B AT 21606 B AT21606 B AT 21606B AT 21606D A AT21606D A AT 21606DA AT 21606 B AT21606 B AT 21606B
Authority
AT
Austria
Prior art keywords
tolylsemicarbazide
preparation
tolylhydrazine
bezw
urea
Prior art date
Application number
Other languages
German (de)
Original Assignee
Farbenfab Vorm Bayer F & Co
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
Priority claimed from DE1903157572D external-priority patent/DE157572C/de
Application filed by Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Application granted granted Critical
Publication of AT21606B publication Critical patent/AT21606B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

  

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   Statt des   sabsanron     m-Tolylhydrazins,   kann man auch die freie,   Base'Mit Harnstoff,,'   verschmelzen oder eine wässerige Lösung von Harnstoff mit    m-Tolylhydrazinmischen und   nach dem Ansäuren mit Essigsäure das Gemisch mehrere Stunden zum Sieden erhitzen. 



   Beispiel 3. 244 g m-Tolylhydrazin werden mit 89 g Äthylurethan drei Stunden 
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 zu trennen, behandelt man das Reaktionsprodukt mit heissem Wasser, wobei ersteres in Lösung geht. Beim Erkalten kristallisiert aus der so erhaltenen Lösung das m-Tolylsemicarbazid aus, das man durch Umkristallisieren weiter reinigt.



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   Instead of the sabsanron m-tolylhydrazine, you can also fuse the free base "with urea" or mix an aqueous solution of urea with m-tolylhydrazine and, after acidifying with acetic acid, heat the mixture to boiling for several hours.



   Example 3. 244 g of m-tolylhydrazine are mixed with 89 g of ethyl urethane for three hours
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 to separate, the reaction product is treated with hot water, the former going into solution. On cooling, the m-tolylsemicarbazide crystallizes out of the solution thus obtained and is further purified by recrystallization.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von m-Tolylsemicarbazid, darin bestehend, dass man m-Tolylhydrazin bezw. dessen Salze auf Harnstoff, Urethane oder Cyansäure bezw. deren Salze einwirken lässt. PATENT CLAIM: Process for the preparation of m-tolylsemicarbazide, consisting in that m-tolylhydrazine bezw. its salts on urea, urethanes or cyanic acid BEZW. whose salts can act.
AT21606D 1903-12-08 1904-08-27 Process for the preparation of m-Tolylsemicarbazide. AT21606B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1903157572D DE157572C (en) 1903-12-08

Publications (1)

Publication Number Publication Date
AT21606B true AT21606B (en) 1905-10-10

Family

ID=5678777

Family Applications (1)

Application Number Title Priority Date Filing Date
AT21606D AT21606B (en) 1903-12-08 1904-08-27 Process for the preparation of m-Tolylsemicarbazide.

Country Status (1)

Country Link
AT (1) AT21606B (en)

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