CH376118A - Process for the preparation of new theophylline derivatives - Google Patents

Process for the preparation of new theophylline derivatives

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Publication number
CH376118A
CH376118A CH6643558A CH6643558A CH376118A CH 376118 A CH376118 A CH 376118A CH 6643558 A CH6643558 A CH 6643558A CH 6643558 A CH6643558 A CH 6643558A CH 376118 A CH376118 A CH 376118A
Authority
CH
Switzerland
Prior art keywords
theophylline
picolyl
preparation
new
derivatives
Prior art date
Application number
CH6643558A
Other languages
German (de)
Inventor
Ernst Dr Jucker
Erwin Dr Rissi
Rudolf Dr Sueess
Original Assignee
Sandoz 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 Sandoz Ag filed Critical Sandoz Ag
Priority to CH6643558A priority Critical patent/CH376118A/en
Priority to GB34517/59A priority patent/GB933152A/en
Priority to GB3845659A priority patent/GB933153A/en
Priority to ES0253594A priority patent/ES253594A1/en
Priority to ES0253637A priority patent/ES253637A2/en
Priority to FR837272A priority patent/FR506M/fr
Publication of CH376118A publication Critical patent/CH376118A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D473/00Heterocyclic compounds containing purine ring systems
    • C07D473/02Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
    • C07D473/04Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms
    • C07D473/06Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms with radicals containing only hydrogen and carbon atoms, attached in position 1 or 3
    • C07D473/08Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms with radicals containing only hydrogen and carbon atoms, attached in position 1 or 3 with methyl radicals in positions 1 and 3, e.g. theophylline

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

  

  



  Verfahren zur Herstellung von neuen Theophyllin-Derivaten
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von neuen, in 7-Stellung   substituier-    ten   Theophyllin-Derivaten    der   allgemeinen Formel I,   
EMI1.1     

Erfindungsgemϯ werden Verbindungen der Formel I hergestellt, indem man Theophyllin mit einem Picolylhalogenid umsetzt.



   Die Ausführung des erfindungsgemässen Verfahrens erfolgt beispielsweise so, da¯ Theophyllin mit einem   Picolylhalogenid    vermischt und während lÏngerer Zeit bei erhöhter Temperatur gehalten wird. Das Reaktionsprodukt liefert nach Umkristallisation aus einem organischen Lösungsmittel ein   7-Picolyl-theo-      phyllin.   



   Die nach dem vorliegenden Verfahren hergestellten, bisher unbekannten Theophyllin-Derivate sowie ihre    Salze und quartären Verbindungen sind bei Raum-    temperatur feste,   kristallisierte Korper. Sie zeichnen    sich bei guter Wasserlöslichkeit durch eine herzschlagbeschleunigende und gefϯentspannende Wir  kung    aus.

   Beispielsweise erwies sich in vivo das. 7-¯  Picolyl-theophylin-hydrochlorid    am   Serotonin-und      Pilocarpin, Bronchospasmus ungefähr gleich starkbron-    cholytisch wirksam wie Theophyllin und etwa 2-bis 4mal stärker als   Dihydroxypropyl-theophyllin. Über-    dies sind die Körper durch eine   histamin-und acetyl-      cholinhemmende      Wirkungskomponente,    wie sie bei Theophyllin-Derivaten bisher unbekannt war,   charak-      terisiert.   



   Im ToxizitÏtstest (an Mäusen) stehen die neuen Präparate in der NÏhe des   Theophylilins.    Die erwähnten Eigenschaften machen sie zu wertvollen Medikamenten, wobei ihre Wasserlöslichkeit, z. T. in Form ihrer Salze, ihre Anwendung, z. B. für Ampullenlösungen, ermöglicht. Die meisten andern bekannten   Theophyllin-Derivate    sind entweder wasserunlöslich oder, wenn sie wasserl¯slich sind, schwÏcher wirksam als Theophyllin.



   Beispiel 1
7-¯-Picolyl-theophyllin
80, 1 g Theophyllin und 66, 4   g    icolylchloridhydrochlorid werden innig vermischt und unter Stickstoffatmosphäre während 3 Std. im Ílbad auf 220¯ erhitzt, wobei sich eine starke   Salzsäuregas-Entwick-    lung einstellt. Zur VervollstÏndigung der Reaktion lässt man das Reaktionsgemisch noch während einer Stunde bei der gleichen Olbadtemperatur am Wasserstrahlvakuum.



   Der auf Zimmertemperatur abgekühlte,   braun-    gefärbte, harte Kolbeninhalt wird darauf 2mal aus   90 /oigem Athanol umkristallisiert und liefert    in guter Ausbeute das reine 7-¯-Picolyl-theophyllin  hydrocMorid.    Smp. 258-260  (Zers.).



   Zur Darstellung der freien Base l¯st man das   HydrocMorid    in wenig Wasser, versetzt die Lösung mit einem Überschuss an 40   figer      Natriumhydroxyd-    lösung und extrahiert die freigesetzte Base mit Chloroform. Der Chloroformextrakt wird  ber Natriumsulfat getrocknet, das Lösungsmittel unter vermindertem Druck bei   50     abdestilliert, und der kristalline Rückstand 2mal aus abs.   Athanol    umkristallisiert. Smp.



  142, 5-144,   5 .    



   Wenn man 9, 0 g   7-, B-Picolyl-theophyllin-Base mit    8, 02 g ¯thylenchlorid (= 3mal die theoretische Menge) vermischt und im Ölbad während 2 Std. auf 160  erhitzt, erhält man nach wiederholter Kristallisation der auf Zimmertemperatur abgekühlten   Rohsub-    stanz aus absolutem und dann aus 95%igem Alkohol das   reine 7- [N- (-Hydroxy-äthylchlorid)--      picolyl]-theophyllin.    Die Reinsubstanz muss mehrere Stunden bei 85  am Hochvakuum getrocknet werden, da sonst infolge   Lösungsmitteleinschl'uss    der   Schmelz-    punkt   umgenau    und bedeutend tiefer ist. Smp. (getrocknet)   224-227"    (Zers.).



   Durch Umsetzung mit Methyljodid erhält man das reine 7-¯-Picolyl-theophyllin-jodmethylat in guter Ausbeute. Smp. 252-253  (Zers.).



   Beispiel 2    7-y-Picolyl-theophyllin   
80, 1 g Theophyllin und 66, 4 g y-Picolylchloridhydrochlorid werden gut vermischt und unter Stickstoffatmosphäre während 4 Std. im Ílbad auf 200  erhitzt, wobei eine starke   Salzsäuregas-Entwicklung    beobachtet werden kann. Zur Vervollständigung der Reaktion lϯt man das Reaktionsgemisch noch wÏhrend einer Stunde bei der gleichen Ílbadtemperatur am Wasserstrahlvakuum.



   Der auf Zimmertemperatur abgekühlte, harte Kolbeninhalt wird darauf 2mal   aus etwa 90e/Oigem    Alkohol umkristallisiert und liefert in guter Ausbeute das reine   7-y-Picolyl-theophyllin-hydrochlorid.    Smp.



     291-293,    5  (Zers.). Zur Darstellung der Base l¯st man das Hydrochlorid in wenig Wasser, versetzt die Lösung mit einem Uberschuss an 40%iger Natrium  hydroxydlösung und extrahiert    die freie Base mit Chloroform. Der   Chloroformextrakt    wird  ber Natriumsulfat getrocknet, das Lösungsmittel unter ver  mindertem    Druck bei 50  abdestilliert und der kristalline Rückstand 2mal mit Aktivkohlezusatz aus abs.



  Alkohol umkristallisiert. Smp.   182-184 .   



   Wenn man 27, 1 g   7-y-Picolyl-theophyllin-Base    mit 24, 15 g Äthylenchlorhydrin   (=    3mal die theoretische Menge) gut vermischt und im Ölbad während 3 Std. auf 150  erhitzt, erhält man nach wiederholter Kristallisation der auf Zimmertemperatur abgekühlten Rohsubstanz aus   90  /o igem Alkohol    das reine    7-[N-(¯'-HydroxyÏthochlorid)-γ-picolyl]-theophyllin.   



  Smp. 274, 5-277, 5  (Zers.).



   Durch Umsetzung mit Methyljodid erhält man das reine 7-y-Picolyl-theophyllin-jodmethylat ; es ist sehr   oxydationsempfindlich    und schmilzt bei 236, 5 bis 238, 5    (Zers.).   



   Beispiel 3    7-a-Picolyl-theophyllin   
95 g Theophyllin (enthaltend   1    Mol   Kristallwas-    ser) und 82 g Picolylchlorid-hydrochlorid werden innig vermischt und das homogene Gemisch während   21/o    Std. im Ílbad auf   180-1900 erhitzt, wobei    die Masse ab   170     unter starker   Salzsäuregas-Entwick-    lung schmilzt.



  



  Process for the preparation of new theophylline derivatives
The present invention relates to a process for the preparation of new theophylline derivatives of the general formula I substituted in the 7-position,
EMI1.1

According to the invention, compounds of the formula I are prepared by reacting theophylline with a picolyl halide.



   The method according to the invention is carried out, for example, in such a way that theophylline is mixed with a picolyl halide and kept at an elevated temperature for a prolonged period. After recrystallization from an organic solvent, the reaction product gives a 7-picolyl-theophylline.



   The hitherto unknown theophylline derivatives and their salts and quaternary compounds produced by the present process are solid, crystallized bodies at room temperature. With good water solubility, they are characterized by their heartbeat accelerating and vascular relaxing effect.

   For example, 7-picolyl-theophylin hydrochloride on serotonin and pilocarpine, bronchospasm proved to be about as broncholytically effective as theophylline and about 2 to 4 times more potent than dihydroxypropyl theophylline. In addition, the bodies are characterized by a histamine- and acetylcholine-inhibiting active component, as was previously unknown with theophylline derivatives.



   In the toxicity test (on mice), the new preparations are close to theophylilin. The properties mentioned make them valuable drugs, while their water solubility, e.g. T. in the form of their salts, their application, z. B. for ampoule solutions. Most of the other known theophylline derivatives are either insoluble in water or, if they are water-soluble, less effective than theophylline.



   example 1
7-¯-picolyl-theophylline
80.1 g theophylline and 66.4 g icolyl chloride hydrochloride are intimately mixed and heated to 220 ° in an oil bath under a nitrogen atmosphere for 3 hours, during which time a strong evolution of hydrochloric acid gas is established. To complete the reaction, the reaction mixture is left for a further hour at the same oil bath temperature under a water-jet vacuum.



   The brown-colored, hard flask contents, cooled to room temperature, are then recrystallized twice from 90% ethanol and give the pure 7-picolyl-theophylline hydrocMoride in good yield. M.p. 258-260 (dec.).



   To prepare the free base, the HydrocMorid is dissolved in a little water, the solution is treated with an excess of 40% sodium hydroxide solution and the released base is extracted with chloroform. The chloroform extract is dried over sodium sulfate, the solvent is distilled off under reduced pressure at 50, and the crystalline residue is extracted twice from abs. Ethanol recrystallized. M.p.



  142, 5-144, 5.



   If you mix 9.0 g of 7-, B-picolyl-theophylline base with 8.02 g of ethylene chloride (= 3 times the theoretical amount) and heat to 160 in an oil bath for 2 hours, after repeated crystallization of the at room temperature The pure 7- [N- (-hydroxy-ethylchloride) -picolyl] -theophylline is obtained from the cooled raw substance from absolute and then from 95% alcohol. The pure substance must be dried for several hours at 85 in a high vacuum, since otherwise the melting point is reversed and significantly lower due to the inclusion of solvent. M.p. (dried) 224-227 "(dec.).



   Reaction with methyl iodide gives pure 7-¯-picolyl theophylline iodomethylate in good yield. M.p. 252-253 (dec.).



   Example 2 7-y-picolyl-theophylline
80.1 g of theophylline and 66.4 g of γ-picolyl chloride hydrochloride are mixed well and heated to 200 in an oil bath for 4 hours under a nitrogen atmosphere, during which time a strong evolution of hydrochloric acid gas can be observed. To complete the reaction, the reaction mixture is left for one hour at the same bath temperature under a water jet vacuum.



   The hard flask contents, cooled to room temperature, are then recrystallized twice from about 90% alcohol and give the pure 7-γ-picolyl-theophylline hydrochloride in good yield. M.p.



     291-293, 5 (dec.). To prepare the base, the hydrochloride is dissolved in a little water, the solution is treated with an excess of 40% sodium hydroxide solution and the free base is extracted with chloroform. The chloroform extract is dried over sodium sulfate, the solvent is distilled off under reduced pressure at 50 and the crystalline residue is extracted twice with the addition of activated carbon from abs.



  Recrystallized alcohol. 182-184.



   If 27.1 g of 7-y-picolyl-theophylline base is mixed well with 24.15 g of ethylene chlorohydrin (= 3 times the theoretical amount) and heated to 150 in an oil bath for 3 hours, the cooled to room temperature is obtained after repeated crystallization The raw substance from 90% alcohol is pure 7- [N- (¯'-HydroxyÏthochlorid) - γ-picolyl] -theophylline.



  M.p. 274, 5-277, 5 (dec.).



   Reaction with methyl iodide gives pure 7-y-picolyl-theophylline-iodomethylate; it is very sensitive to oxidation and melts at 236.5 to 238.5 (dec.).



   Example 3 7-α-Picolyl-theophylline
95 g of theophylline (containing 1 mol of crystal water) and 82 g of picolyl chloride hydrochloride are intimately mixed and the homogeneous mixture is heated in an oil bath to 180-1900 for 21 / o hours, the mass from 170 ° C. under strong evolution of hydrochloric acid gas melts.

 

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung von neuen, in 7-Stellung substituierten TheophylIm-Derivaten der allgemeinen Formel I, EMI2.1 dadurch gekennzeichnet, dass man Theophyllin mit einem Picolylhalogenid umsetzt. PATENT CLAIM Process for the preparation of new theophylIm derivatives of the general formula I substituted in the 7-position, EMI2.1 characterized in that theophylline is reacted with a picolyl halide.
CH6643558A 1958-11-21 1958-11-21 Process for the preparation of new theophylline derivatives CH376118A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CH6643558A CH376118A (en) 1958-11-21 1958-11-21 Process for the preparation of new theophylline derivatives
GB34517/59A GB933152A (en) 1958-11-21 1959-10-12 Improvements in or relating to theophylline compounds
GB3845659A GB933153A (en) 1958-11-21 1959-11-12 Improvements in or relating to theophylline derivatives
ES0253594A ES253594A1 (en) 1958-11-21 1959-11-20 Improvements in or relating to theophylline derivatives
ES0253637A ES253637A2 (en) 1958-11-21 1959-11-21 Improvements in or relating to theophylline derivatives
FR837272A FR506M (en) 1958-11-21 1960-08-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH6643558A CH376118A (en) 1958-11-21 1958-11-21 Process for the preparation of new theophylline derivatives

Publications (1)

Publication Number Publication Date
CH376118A true CH376118A (en) 1964-03-31

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ID=4527166

Family Applications (1)

Application Number Title Priority Date Filing Date
CH6643558A CH376118A (en) 1958-11-21 1958-11-21 Process for the preparation of new theophylline derivatives

Country Status (3)

Country Link
CH (1) CH376118A (en)
ES (2) ES253594A1 (en)
GB (1) GB933153A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115850279A (en) * 2022-12-05 2023-03-28 哈尔滨工业大学(深圳) Theophylline derived autoignition ionic salt and preparation method thereof

Also Published As

Publication number Publication date
GB933153A (en) 1963-08-08
ES253637A2 (en) 1960-08-01
ES253594A1 (en) 1960-06-16

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