AT71175B - Process for the preparation of salizyloyl theobromine. - Google Patents

Process for the preparation of salizyloyl theobromine.

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Publication number
AT71175B
AT71175B AT71175DA AT71175B AT 71175 B AT71175 B AT 71175B AT 71175D A AT71175D A AT 71175DA AT 71175 B AT71175 B AT 71175B
Authority
AT
Austria
Prior art keywords
theobromine
salizyloyl
preparation
derivatives
parent patent
Prior art date
Application number
Other languages
German (de)
Original Assignee
Merck Ag E
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.)
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Publication date
Application filed by Merck Ag E filed Critical Merck Ag E
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Publication of AT71175B publication Critical patent/AT71175B/en

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Description

  

   <Desc/Clms Page number 1> 
 



    Verfahren zur Darstellung von Salizyloyltheobromin.   



   Durch das Stammpatent Nr. 71174 ist ein Verfahren zur Darstellung von O-Azidylderivaten des Salizyloyltheobromins der allgemeinen Formel : 
 EMI1.1 
 geschützt. Die therapeutische Bedeutung, welche, wIe in dem Stammpatente dargelegt ist, den Salizyloylderivaten des Theobromins zukommt, liess es wünschenswert erscheinen, auch das freie   Sa1izyloyltheobromin   darzustellen, da zu erwarten war, dass diesem infolge der freien Phenolhydroxylgruppe eine noch schnellere therapeutische Wirkung zukommt. 



   Der Gedanke, das Salizyloyltheobromin nach Art seiner Azidylderivate durch Einwirkung von freiem Salizyloylchlorid auf Theobromin zu gewinnen, liess sich bis jetzt nicht durchführen, da die bei jenen Säurechloriden vorhandene Neigung zur Bildung innerer Anhydride in noch grösserem Masse vorhanden ist.   Tatsächlich   erhält man auch bei der   Einwirkung von Satizyloyichlorid   auf Theobromin oder dessen Salze in der Hauptsache stickstofffreie. sallzylidartige Verbindungen. 



   Es gelingt jedoch, zu dem bisher noch nicht bekannten Salizyloyltheobromin zu gelangen, wenn man die in dem   Stammpatente   beschriebenen O-Azidylderivate unter sehr vorsichtigen Bedingungen verseift. Dieser Reaktionsverlauf war nicht zu erwarten, da zu befürchten stand, dass verseifende Mittel sofort zu einem Zerfall in Theobromin und Salizyl-   säure führen würden. Tatsächlich   tritt dieser Reaktionsverlauf auch ein, wenn nicht unter besonderen Vorsichtsmassregeln gearbeitet   \\ird.   
 EMI1.2 
 und Natriumkarbonat, etwas schwerer in Bikarbonat, mit der für   N-Salizyloylverbindungen     charakteristischen     gelben   Farbe. In alkoholischer Lösung geben sie mit Eisenchlorid eine tief blutrote Färbung. 



   B e i s p i e l 2 : Schüttelt man   Azetsalizyloyitheobromin (Beispie) 1   und 2 des Stamm- 
 EMI1.3 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



    Process for the preparation of salizyloyl theobromine.



   The parent patent No. 71174 provides a process for the preparation of O-azidyl derivatives of salizyloyl theobromine of the general formula:
 EMI1.1
 protected. The therapeutic importance of the salizyloyl derivatives of theobromine, as stated in the parent patent, made it appear desirable to also present the free salicyloyl theobromine, since it was to be expected that this would have an even faster therapeutic effect due to the free phenolic hydroxyl group.



   The idea of obtaining salizyloyl theobromine in the manner of its azidyl derivatives by the action of free salizyloyl chloride on theobromine could not be carried out until now, since the tendency of these acid chlorides to form internal anhydrides is even greater. In fact, the action of saticyloyichloride on theobromine or its salts mainly results in nitrogen-free. salzylid-like compounds.



   However, it is possible to arrive at the hitherto unknown salizyloyl theobromine if the O-azidyl derivatives described in the parent patent are saponified under very careful conditions. This course of the reaction was not to be expected, since it was feared that saponifying agents would immediately break down into theobromine and salicylic acid. In fact, this course of reaction also occurs if special precautionary measures are not taken.
 EMI1.2
 and sodium carbonate, slightly heavier in bicarbonate, with the yellow color characteristic of N-salizyloyl compounds. In an alcoholic solution they give a deep blood-red color with ferric chloride.



   Example 2: If you shake Acetsalizyloyitheobromin (Example) 1 and 2 of the parent
 EMI1.3
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Weitere Ausbildung des durch das Stammpatent Nr. 71174 geschützten Verfahrens, darin bestehend, dass man zwecks Darstellung von Salizyloyltheobromin die nach dem Verfahren des Stammpatentes erhältlichen Azidylsalizyloylderivate des Theobromins der vorsichtigen Verseifung unterwirft. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Further development of the process protected by the parent patent no. 71174, consisting in the fact that the azidylsalizyloyl derivatives of theobromine obtained by the process of the parent patent are subjected to careful saponification for the purpose of preparing salizyloyl theobromine. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT71175D 1915-01-04 1915-01-04 Process for the preparation of salizyloyl theobromine. AT71175B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT71175T 1915-01-04
AT71174T 1915-01-04

Publications (1)

Publication Number Publication Date
AT71175B true AT71175B (en) 1916-02-10

Family

ID=25603585

Family Applications (1)

Application Number Title Priority Date Filing Date
AT71175D AT71175B (en) 1915-01-04 1915-01-04 Process for the preparation of salizyloyl theobromine.

Country Status (1)

Country Link
AT (1) AT71175B (en)

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