DE224981C - - Google Patents

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Publication number
DE224981C
DE224981C DENDAT224981D DE224981DA DE224981C DE 224981 C DE224981 C DE 224981C DE NDAT224981 D DENDAT224981 D DE NDAT224981D DE 224981D A DE224981D A DE 224981DA DE 224981 C DE224981 C DE 224981C
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Germany
Prior art keywords
theophylline
piperazine
compounds
mol
solution
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DENDAT224981D
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German (de)
Publication of DE224981C publication Critical patent/DE224981C/de
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    • 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

Description

KAISERLICHES % IMPERIAL %

/A/ A

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

KLASSE Mp. GRUPPE 7.Uξ/ CLASS Mp. 7.Uξ GROUP /

aus Theophyllin und Piperazin.from theophylline and piperazine.

Zusatz zum Patente 214376 vom 4. Mai 1907.*)Addendum to patent 214376 from May 4, 1907. *)

Patentiert im Deutschen Reiche vom 18, Dezember 1908 ab. Längste Dauer: 3. Mai 1922.Patented in the German Empire on December 18, 1908. Longest duration: May 3, 1922.

Im Hauptpatent 214376 und dessen Zusätzen 217620 und 223695 ist beschrieben, daß man aus Theophyllin und Piperazin oder anderen primären oder sekundären aliphatischen Diaminen leicht lösliche Doppelverbindungen herstellen kann. Die Darstellung gelingt nicht nur mit molekularen, sondern, wie im Zusatzpatent 223695 ausgeführt wurde, auch mit einer geringeren Menge des Diamins. Es wurde nun weiter gefunden, daß nicht nur Diamine, wie Äthylendiamin, Hexamethylendiamin oder Lysidin, sondern auch das Piperazin selbst in einer etwas gefingeren als molekularen Menge angewandt werden kann, um zu leicht löslichen Doppel verbindungen zu gelangen. Dabei kann man jedoch die Menge des Piperazins ebenfalls nicht wesentlich mehr als auf 3/4 Mol. reduzieren, da man sonst zu Verbindungen gelangt, die sich nicht mehr leicht und völlig in Wasser lösen. Diese Verbindungen bestehen aus Gemischen von primärem und sekundärem Salz. Bei Verwendung von 3/4 Mol. sind diese beiden zu ungefähr gleichen Molteilen vorhanden.In the main patent 214376 and its additions 217620 and 223695 it is described that easily soluble double compounds can be prepared from theophylline and piperazine or other primary or secondary aliphatic diamines. The representation succeeds not only with molecular, but, as stated in additional patent 223695, also with a smaller amount of diamine. It has now been found that not only diamines, such as ethylenediamine, hexamethylenediamine or lysidine, but also the piperazine itself can be used in a somewhat more delicate than molecular amount in order to obtain easily soluble double compounds. In this case, one can, however, the amount of piperazine is also not much more than to 3/4 mol. Cut, because otherwise come to compounds which are not easily and completely dissolve in water. These compounds consist of mixtures of primary and secondary salt. When using 3/4 Mol. These same two to about molar parts of are present.

Die Darstellung geschieht, indem man die Komponenten unverdünnt oder in einem Lösungsmittel aufeinander einwirken läßt.The representation is done by placing the components undiluted or in a solvent can act on each other.

Durch. Abdunsten, am besten im Vakuum, bei gewöhnlicher Temperatur erhält man die Verbindungen in fester Form, sie sind färblos, besitzen keinen scharfen Schmelzpunkt, ■: weil sie beim Erhitzen stark dissociieren, sie ' sind von alkalischer Reaktion und lösen sich sehr leicht bereits in wenig Wasser wieder auf. In Alkohol sind sie schwerer löslich. Sie werden durch Säure unter Abspaltung von Theophyllin und unter Bildung des betreffenden Piperazinsalzes zerlegt. Auch die Kohlensäure wirkt schon in diesem Sinne spaltend ein.By. Evaporation, preferably in a vacuum, at ordinary temperature you get the Compounds in solid form, they are colorless, do not have a sharp melting point, ■: because they dissociate strongly when heated, they ' have an alkaline reaction and dissolve very easily in just a little water on. They are more difficult to dissolve in alcohol. They are split off by acid Theophylline and decomposed to form the piperazine salt in question. Also the carbon dioxide already has a divisive effect in this sense.

Die Piperazinkomponente kann in den Doppelverbindungen unmittelbar mit Mineralsäuren quantitativ bestimmt werden unter Verwendung von Methylorange als Indikator. Das schwer lösliche Theophyllin fällt nach der Neutralisation kristallinisch aus und kann in bekannter Weise identifiziert werden. The piperazine component can in the double compounds directly with mineral acids can be quantified using methyl orange as an indicator. That Theophylline, which is poorly soluble, precipitates in crystalline form after neutralization and can be identified in a known manner.

Beispiele:Examples:

1. 146 g (3/4 Mol.) kristallisiertes Piperazin werden auf dem Wasserbad geschmolzen und dann 198 g (1 Mol.) Theophyllin unter Rühren eingetragen. Das letztere geht dabei zunächst in Lösung, und die Doppelverbindung scheidet sich kristallinisch aus; sie wird im Vakuum bei gewöhnlicher Temperatur getrocknet.1. 146 g (3/4 mol.) Crystallized piperazine are melted on a water bath and then 198 g (1 mol.) Theophylline was added with stirring. The latter initially goes into solution and the double compound separates out in crystalline form; it is dried in a vacuum at ordinary temperature.

2. 198 g (1 Mol.) Theophyllin werden mit 1550 g- ioprozentigem Piperazin (4/5 Mol.) ge-2. 198 g (1 mol.) Theophylline be bought 1550 g- ioprozentigem piperazine (4/5 mole).

Frühere Zusatzpatente: 217620, 223695.Previous additional patents: 217620, 223695.

Claims (1)

schüttelt, bis Lösung eingetreten ist, wobei man zur Beschleunigung der Auflösung auch schwach erwärmen kann. Die Lösung wird im Vakuum bei einer Temperatur von etwa 400 zur Trockne gebracht.shakes until solution has occurred, whereby you can also heat slightly to accelerate the dissolution. The solution is brought under vacuum at a temperature of about 40 0 to dryness. • Patent-Anspruch:• Patent claim: Abänderung der durch Patent 214376 und dessen Zusätze 223695 und 217620 geschützten Verfahren zur Darstellung von in Wasser leicht löslichen Doppelverbindungen aus Theophyllin und primären oder sekundären aliphatischen Diaminen, darin bestehend, daß man auch das Piperazin in einem etwas geringeren als molekularen Verhältnis auf Theophyllin einwirken läßt, wobei man auch von den Salzen beider Komponenten ausgehen kann.Modification of the patent 214376 and its additions 223695 and 217620 Protected process for the preparation of double compounds which are easily soluble in water from theophylline and primary or secondary aliphatic diamines, consisting in the fact that the piperazine is also in allows theophylline to act in a somewhat lower than molecular ratio, it is also possible to start from the salts of both components.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748005C (en) * 1939-12-15 1944-10-23 Process for the production of readily water-soluble compounds of theophylline or caffeine
DE762284C (en) * 1940-07-15 1952-07-24 Byk Guldenwerke Chem Fab A G Process for increasing the water solubility of dimethylxanthines and their compounds
DE908857C (en) * 1951-05-28 1954-06-08 Hoffmann La Roche Process for the preparation of an easily soluble compound from theophylline and 3-aminomethylpyridine
DE944518C (en) * 1950-08-20 1956-06-14 Byk Gulden Lomberg Chem Fab Process for the preparation of solutions of xanthines substituted in the 1,3-position
DE1207936B (en) * 1961-03-17 1965-12-30 Boehringer Sohn Ingelheim Process for the preparation of water-soluble theophylline compounds of bisquaternary ammonium hydroxides
DE2547916A1 (en) * 1975-10-25 1977-05-05 Zahnradfabrik Friedrichshafen Hydraulic servo motor shutdown switch - has valve separating feed and return fluid conduits

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070295A (en) * 1998-09-22 2000-06-06 Bemis Manufacturing Company Quick release toilet seat hinge with swivel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748005C (en) * 1939-12-15 1944-10-23 Process for the production of readily water-soluble compounds of theophylline or caffeine
DE762284C (en) * 1940-07-15 1952-07-24 Byk Guldenwerke Chem Fab A G Process for increasing the water solubility of dimethylxanthines and their compounds
DE944518C (en) * 1950-08-20 1956-06-14 Byk Gulden Lomberg Chem Fab Process for the preparation of solutions of xanthines substituted in the 1,3-position
DE908857C (en) * 1951-05-28 1954-06-08 Hoffmann La Roche Process for the preparation of an easily soluble compound from theophylline and 3-aminomethylpyridine
DE1207936B (en) * 1961-03-17 1965-12-30 Boehringer Sohn Ingelheim Process for the preparation of water-soluble theophylline compounds of bisquaternary ammonium hydroxides
DE2547916A1 (en) * 1975-10-25 1977-05-05 Zahnradfabrik Friedrichshafen Hydraulic servo motor shutdown switch - has valve separating feed and return fluid conduits

Also Published As

Publication number Publication date
DE214376C (en)
DE217620C (en)
DE223695C (en)

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