DE224981C - - Google Patents
Info
- 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
- Authority
- DE
- Germany
- Prior art keywords
- theophylline
- piperazine
- compounds
- mol
- solution
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D473/00—Heterocyclic compounds containing purine ring systems
- C07D473/02—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
- C07D473/04—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms
- C07D473/06—Heterocyclic 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
- C07D473/08—Heterocyclic 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.
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE223695T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE224981C true DE224981C (en) |
Family
ID=33035725
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT223695D Active DE223695C (en) | |||
DENDAT217620D Active DE217620C (en) | |||
DENDAT214376D Active DE214376C (en) | |||
DENDAT224981D Active DE224981C (en) |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT223695D Active DE223695C (en) | |||
DENDAT217620D Active DE217620C (en) | |||
DENDAT214376D Active DE214376C (en) |
Country Status (1)
Country | Link |
---|---|
DE (4) | DE224981C (en) |
Cited By (6)
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)
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 |
-
0
- DE DENDAT223695D patent/DE223695C/de active Active
- DE DENDAT217620D patent/DE217620C/de active Active
- DE DENDAT214376D patent/DE214376C/de active Active
- DE DENDAT224981D patent/DE224981C/de active Active
Cited By (6)
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) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE224981C (en) | ||
DE172447C (en) | ||
DE287801C (en) | ||
DE479016C (en) | Process for the production of choline monoborate | |
DE538981C (en) | Process for the preparation of tetrazoles | |
DE64923C (en) | Process for the preparation of new nitrogenous bases from pyruvic acid and alkylated o-diamines | |
DE961086C (en) | Process for the preparation of oxazolidone- (2) | |
DE211403C (en) | ||
DE664309C (en) | Process for the preparation of amides of higher molecular weight carboxylic acids | |
AT158301B (en) | Process for the production of vitamin B1. | |
DE454697C (en) | Process for the preparation of compounds of the 1-aryl-2-alkyl- and 1-aryl-2-aralkyl-3, 4-cyclotrimethylene-5-pyrazolones with dialkyl and arylalkyl barbituric acids | |
DE687250C (en) | Process for the preparation of primary and secondary adipic acid hexamethylenetetramine | |
DE215007C (en) | ||
DE4110607C1 (en) | Treatment of highly viscous mixt. from dipyridamole prodn. - involves heating and mixing with methyl urea, adding hydrochloric acid, further heating etc. to recover valuable intermediates | |
DE516970C (en) | Process for the preparation of mixtures of monopotassium and monoammonium orthophosphate | |
DE170048C (en) | ||
DE222741C (en) | ||
DE109486C (en) | ||
DE223796C (en) | ||
DE585995C (en) | Process for the production of compounds of caffeine and the hydrochloric acid salts of quinine or the derivatives of cupreine | |
DE713079C (en) | Process for the preparation of clusters of 4-aminobenzenesulfonamides | |
DE501280C (en) | Process for the preparation of 4- (B-oxyaethylamino-) 1-oxybenzene | |
DE576020C (en) | Process for the preparation of guanidinoamine compounds | |
DE124426C (en) | ||
DE279201C (en) |