CH206118A - Process for the preparation of a thiazolium compound. - Google Patents
Process for the preparation of a thiazolium compound.Info
- Publication number
- CH206118A CH206118A CH206118DA CH206118A CH 206118 A CH206118 A CH 206118A CH 206118D A CH206118D A CH 206118DA CH 206118 A CH206118 A CH 206118A
- Authority
- CH
- Switzerland
- Prior art keywords
- methyl
- hydrochloride
- preparation
- thiazolium
- amino
- Prior art date
Links
Landscapes
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Verfahren zur Darstellung einer Thiazoliumverbindung. Das Hauptpatent betrifft die Herstellung von Pyrimidylthiazoliumverbirrdungen, die im Hinblick auf ihre antineuritische Wirkung wertvoll sind.
Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung einer Thiazo- liumverbindung, welches dadurch gekenn zeichnet ist, dass man 2-1lfethyl-4-amino-5- chlor:netlryl-pyrimidirr-hydrochlorid auf 4-Me- thyl-5-oxyäthylthiazol einwirken lässt und das entstandene N-(2'-1fIethyl-4'-amino-pyri- midyl-(5')- methyl) - 4 - methyl- 5 -ogyäthyl-thi- azoliumchlorid-hydrochlorid abscheidet.
Das Reaktionsprodukt fällt man zweckmässig aus dessen alkoholischer Lösung mit ätherischer Chlorwasserstoffsäure aus.
Das so erhältliche Hydrochlorid des N (2'-Methyl-4'-am ino-pyrirnidy 1- (5') -methyl)-4- methyl-5-oxyäthyl-thiazoliurnchlorids bildet gelbe Kristalle vom Schmelzpunkt<B>250'.</B> Es ist leicht löslich in Wasser. Es hat sich als pientisch mit dem antineuritischen Vitamin BI (Aneurin) erwiesenund soll therapeutische Anwendung finden.
<I>Beispiel:</I> 2 g 2-Methyl-4-amino-5-chlormethylpyri- midin werden in Form des Hydrochlorids mit 1 g 4-Methyl-5-ogyäthylthiazol 1 Stunde im Wasserbad erwärmt. Man zieht dann die Schmelze wiederholt mit Äther aus, löst den Rückstand in wasserfreiem Alkohol und setzt ätherische Ohlorwasserstoffsäure zu. Dabei fällt das Hydrochlorid des N-(2'-Methyl-4'- amino - pyrimidyl - 5'- methyl)-4-methyl-5-oxy- äthyl-thiazoliumclrlorids in Kristallen vom F. 250 (unter Zersetzung) aus.
Die als Ausgangsstoff verwendete Pyrimi- dinverbindung erhält man durch Einwirken einer Lösung von 1 g Natriumnitrit in wenig Wasser auf eine Suspension von 2-Methyl-4- amino- 5 -ami rromethylpyrimidin-hydrochlorid in 50 cm' konzentrierter Salzsäure, Einengen der Lösung, nachdem die Stickstoffentwick- tung beendet ist, Alkalischmachen der Mi schung unter Kühlen mit Kaliumcarbonat, Extrahieren der Base mit Äther, Trocknen der ätherischen Lösung über Kaliumcarbonat,
Abdampfen des Äthers und Umwandlung des in farblosen Kristallen erhaltenen 2-Methyl- 4-amino-5-chlor-methylpyrimidirrs in das Hy drochlorid mittels ätherischer Chlorwasser stoffsäure.
Process for the preparation of a thiazolium compound. The main patent relates to the manufacture of pyrimidylthiazolium compounds which are valuable in terms of their antineuritic effect.
The subject of the present patent is a process for the production of a thiazolium compound, which is characterized in that 2-1lfethyl-4-amino-5-chloro: methyl-pyrimidir-hydrochloride is acted on 4-methyl-5-oxyethylthiazole leaves and the resulting N- (2'-1fIethyl-4'-aminopyrimidyl- (5 ') - methyl) - 4 - methyl-5 -ogyethyl-thiazolium chloride hydrochloride separates.
The reaction product is expediently precipitated from its alcoholic solution with ethereal hydrochloric acid.
The hydrochloride of N (2'-methyl-4'-aminopyrirnidy 1- (5 ') -methyl) -4-methyl-5-oxyethyl-thiazolium chloride obtainable in this way forms yellow crystals with a melting point of 250 ° / B> It is easily soluble in water. It has been shown to be pientic with the antineuritic vitamin BI (aneurine) and is intended to find therapeutic use.
<I> Example: </I> 2 g of 2-methyl-4-amino-5-chloromethylpyrimidine are heated in the form of the hydrochloride with 1 g of 4-methyl-5-ogyäthylthiazole for 1 hour in a water bath. The melt is then repeatedly extracted with ether, the residue is dissolved in anhydrous alcohol and ethereal hydrochloric acid is added. The hydrochloride of N- (2'-methyl-4'-amino-pyrimidyl-5'-methyl) -4-methyl-5-oxy-ethyl-thiazolium chloride precipitates in crystals with a melting point of 250 (with decomposition).
The pyrimidine compound used as starting material is obtained by the action of a solution of 1 g of sodium nitrite in a little water on a suspension of 2-methyl-4-amino-5-ami rromethylpyrimidine hydrochloride in 50 cm 'of concentrated hydrochloric acid, after concentrating the solution the evolution of nitrogen has ended, make the mixture alkaline while cooling with potassium carbonate, extract the base with ether, dry the ethereal solution over potassium carbonate,
Evaporation of the ether and conversion of the 2-methyl-4-amino-5-chloro-methylpyrimidirrs obtained in colorless crystals into the hydrochloride by means of ethereal hydrochloric acid.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE206118X | 1936-01-28 | ||
CH202663T | 1937-01-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH206118A true CH206118A (en) | 1939-07-15 |
Family
ID=25723816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH206118D CH206118A (en) | 1936-01-28 | 1937-01-08 | Process for the preparation of a thiazolium compound. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH206118A (en) |
-
1937
- 1937-01-08 CH CH206118D patent/CH206118A/en unknown
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