CH254801A - Process for the preparation of 2-amino-6-oxy-8- (tetraoxybutyl) pteridine. - Google Patents

Process for the preparation of 2-amino-6-oxy-8- (tetraoxybutyl) pteridine.

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Publication number
CH254801A
CH254801A CH254801DA CH254801A CH 254801 A CH254801 A CH 254801A CH 254801D A CH254801D A CH 254801DA CH 254801 A CH254801 A CH 254801A
Authority
CH
Switzerland
Prior art keywords
parts
weight
oxy
pteridine
tetraoxybutyl
Prior art date
Application number
Other languages
German (de)
Inventor
F Hoffmann- Aktiengesellschaft
Original Assignee
Hoffmann La Roche
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 Hoffmann La Roche filed Critical Hoffmann La Roche
Publication of CH254801A publication Critical patent/CH254801A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D475/00Heterocyclic compounds containing pteridine ring systems
    • C07D475/02Heterocyclic compounds containing pteridine ring systems with an oxygen atom directly attached in position 4
    • C07D475/04Heterocyclic compounds containing pteridine ring systems with an oxygen atom directly attached in position 4 with a nitrogen atom directly attached in position 2

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

Description

  

  Verfahren zur Darstellung von     2-Amino-6-oxy-8-(tetraoxybutyl)-pteridin.       Es     wurde    gefunden,     da.ss    man     2-Amino-          ()-ox5#-8-(tetraoxybutyl)-pteridin    in einfacher  Weise und guter Ausbeute erhält, wenn man       Ketoliexosen,    wie z. B.     rructose    oder     Sorbose,          ili        schwach    saurer Lösung bei Gegenwart von       Hydra.zin    auf     2,4,5-Triamino-6-oxypyrimidin          einwirken    lässt.

   Vorteilhaft erweist sich der       Zusah    von Borsäure, da. dadurch die Kon  densation beschleunigt wird. Das neue     2-          A.mino-6-oxy-8-(tetraoxybutyl)-pteridin    stellt  ein     hellbraunes    amorphes Pulver dar, das  sich     ab    280  C     zersetzt,    ohne zu schmelzen.       Die        Maxima,    im     Ultraviolett..Spektrum    liegen  bei. 253 und 363     mli;    es. bildet ein     Zvvischen-          produkt    für die Gewinnung von Arzneimit  teln.  



       Beispiel   <I>1:</I>  18,8 Gewichtsteile     2,4,5-Triamino-6-oxy-          li,#7i iniidin-liydroehlorid,    14,6 Gewichtsteile       Natriumacetat        (kristallisiert    mit 3     H20),     7 Gewichtsteile Eisessig, 19,2     Gewichtsteile          d-Fructose,    6 Gewichtsteile     Hydra-zinhydrat     werden in 180 Gewichtsteilen Wasser 7 Stun  den auf dem Dampfbad erwärmt.

   Die Luft  im Reaktionsgefäss wird zweckmässig durch  ein     inertes    Gas, wie Kohlendioxyd oder  Stickstoff, verdrängt,- um die Oxydation des  2,4,     5-Tria.rnino-6-oxy        py        riinidins    zu verhin  dern.     Anfänglich    geht alles in Lösung, und  erst nach einiger Zeit scheidet sich das Kon  densationsprodukt in fester Form ab. Nach  dem Abkühlen wird abgesaugt, mit Wasser,  Alkohol     und    Äther     gewaschen    und bei 80  C    getrocknet.

   Die Ausbeute beträgt 16,8     Ge-          wichtsteile.    Ein reines Produkt wird erhal  ten durch Auflösen in 100%iger Ameisen  säure, Behandeln mit Tierkohle und Ausfäl  len durch Zusatz von Wasser. Das     2-Amino-          6-oxy-8-(tetraoxybutyl)-pteridin    stellt ein       hellbraunes    amorphes Pulver dar, das sich  ab 280  C zersetzt, ohne zu schmelzen.  



       Beispiel   <I>2:</I>  18,8 Gewichtsteile     2,4,5-Triamino-6-oxy-          pyrimidin-hydrochlorid,    14,6 Gewichtsteile       Natriumacetat        (kristallisiert    mit 3     H.@0),     7 Gewichtsteile     Eisessig,    19,2 Gewichtsteile       d-Fructose,    6 Gewichtsteile     Hydrazinhydrat.     12     Gewichtsteile    Borsäure und 180 Gewichts  teile Wasser werden unter     Luftausschluss     7 Stunden auf dem Dampfbad erwärmt.

   Das       gebildete    2 -     Amino    -     6-oxy-8-(tetr        aoxybutyl)-          pteridin    (20,8 Gewichtsteile) wird wie in  Beispiel 1 aufgearbeitet.

           Beispiel   <I>3:</I>    12,6 Gewichtsteile     2,4,5-TriamÜno-6-oxy-          pyrimidin-hydrochlorid,    9,8 Gewichtsteile       Natriumacetat    (kristallisiert mit 3     Hr0),    4,7  Gewichtsteile Eisessig, 12,8     Gewichtsteile          1-Sorbose,

      8 Gewichtsteile Borsäure und 4 Ge  wichtsteile     Hydrazinhydrat    werden in 120  Gewichtsteilen Wasser 7 Stunden     unter        Luft-          ausschluss    auf dem Dampfbad     erwärmt.    Das       gebildete    2 -     Amino    -     6-oxy-8-(tetraoxybutyl)-          pteridin    (10,3 Gewichtsteile) wird wie in  Beispiel 1 aufgearbeitet.



  Process for the preparation of 2-amino-6-oxy-8- (tetraoxybutyl) pteridine. It has been found that 2-amino () -ox5 # -8- (tetraoxybutyl) pteridine is obtained in a simple manner and in good yield when ketoliexoses, such as. B. rructose or sorbose, ili weakly acidic solution in the presence of hydrazine on 2,4,5-triamino-6-oxypyrimidine can act.

   The addition of boric acid proves advantageous because. thereby the condensation is accelerated. The new 2- A.mino-6-oxy-8- (tetraoxybutyl) -pteridine is a light brown amorphous powder that decomposes at 280 C without melting. The maxima in the ultraviolet spectrum are included. 253 and 363 mli; it. forms an intermediate product for the production of drugs.



       Example <I> 1: </I> 18.8 parts by weight of 2,4,5-triamino-6-oxy- li, # 7i iniidin-liydroehlorid, 14.6 parts by weight of sodium acetate (crystallized with 3 H20), 7 parts by weight of glacial acetic acid, 19.2 parts by weight of d-fructose, 6 parts by weight of hydrazine hydrate are heated in 180 parts by weight of water for 7 hours on the steam bath.

   The air in the reaction vessel is expediently displaced by an inert gas such as carbon dioxide or nitrogen - in order to prevent the oxidation of the 2,4,5-tria.rnino-6-oxy py riinidins. Initially everything goes into solution and only after some time does the condensation product separate out in solid form. After cooling, it is filtered off with suction, washed with water, alcohol and ether and dried at 80.degree.

   The yield is 16.8 parts by weight. A pure product is obtained by dissolving it in 100% formic acid, treating it with animal charcoal and precipitating it by adding water. The 2-amino-6-oxy-8- (tetraoxybutyl) -pteridine is a light brown amorphous powder that decomposes from 280 ° C without melting.



       Example <I> 2: </I> 18.8 parts by weight 2,4,5-triamino-6-oxy-pyrimidine hydrochloride, 14.6 parts by weight sodium acetate (crystallized with 3 H. @ 0), 7 parts by weight glacial acetic acid, 19th , 2 parts by weight of d-fructose, 6 parts by weight of hydrazine hydrate. 12 parts by weight of boric acid and 180 parts by weight of water are heated on the steam bath for 7 hours with exclusion of air.

   The 2 - amino - 6-oxy-8- (tetroxybutyl) pteridine (20.8 parts by weight) formed is worked up as in Example 1.

           Example <I> 3: </I> 12.6 parts by weight 2,4,5-triamuno-6-oxy-pyrimidine hydrochloride, 9.8 parts by weight sodium acetate (crystallized with 3 Hr0), 4.7 parts by weight glacial acetic acid, 12, 8 parts by weight of 1-sorbose,

      8 parts by weight of boric acid and 4 parts by weight of hydrazine hydrate are heated in 120 parts by weight of water for 7 hours on a steam bath with exclusion of air. The 2 - amino - 6-oxy-8- (tetraoxybutyl) pteridine (10.3 parts by weight) formed is worked up as in Example 1.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 2-Amino- 6-oxy-8-(tetraoxybutyl)-pteridin, dadurch ge kennzeichnet, dass man $etohexosen bei Ge genwart von Hydrazin in schwach saurer Lösung auf 2,4,5-Triamino-6-oxypyrimidin einwirken lässt. Das 2 - Amino - 6 - oxy - 8-(tetraoxybutyl)- pteridin stellt ein hellbraunes amorphes Pul- ver dar, das sich bei 280 C zersetzt, ohne zu schmelzen. PATENT CLAIM: Process for the preparation of 2-amino-6-oxy-8- (tetraoxybutyl) -pteridine, characterized in that $ etohexoses are converted to 2,4,5-triamino-6- in the presence of hydrazine in weakly acidic solution. lets oxypyrimidine act. The 2 - amino - 6 - oxy - 8- (tetraoxybutyl) - pteridine is a light brown amorphous powder that decomposes at 280 C without melting. Die Maxima im Ultraviolett-:S.pek- trum liegen bei 253 und<B>363</B> mit. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man die Kondensation in Gegenwart von Borsäure ausführt. The maxima in the ultraviolet spectrum are 253 and <B> 363 </B> with. SUBCLAIM: Process according to patent claim, characterized in that the condensation is carried out in the presence of boric acid.
CH254801D 1947-03-13 1947-03-13 Process for the preparation of 2-amino-6-oxy-8- (tetraoxybutyl) pteridine. CH254801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH254801T 1947-03-13

Publications (1)

Publication Number Publication Date
CH254801A true CH254801A (en) 1948-05-31

Family

ID=4470760

Family Applications (1)

Application Number Title Priority Date Filing Date
CH254801D CH254801A (en) 1947-03-13 1947-03-13 Process for the preparation of 2-amino-6-oxy-8- (tetraoxybutyl) pteridine.

Country Status (1)

Country Link
CH (1) CH254801A (en)

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