AT119962B - Process for the preparation of N-chloroiodine compounds of α-aminopyridine and its derivatives. - Google Patents

Process for the preparation of N-chloroiodine compounds of α-aminopyridine and its derivatives.

Info

Publication number
AT119962B
AT119962B AT119962DA AT119962B AT 119962 B AT119962 B AT 119962B AT 119962D A AT119962D A AT 119962DA AT 119962 B AT119962 B AT 119962B
Authority
AT
Austria
Prior art keywords
aminopyridine
chloroiodine
derivatives
compounds
preparation
Prior art date
Application number
Other languages
German (de)
Original Assignee
Schering Kahlbaum 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 Schering Kahlbaum Ag filed Critical Schering Kahlbaum Ag
Application granted granted Critical
Publication of AT119962B publication Critical patent/AT119962B/en

Links

Landscapes

  • Pyridine Compounds (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von   N-Cl1lOljodverbindungen   des   (1. -Aminopyridins und   seiner
Derivate. 



   Wie gefunden wurde, verbinden sich a-Aminopyridin und seine Derivate mit Chlorjod in saurer Lösung unter Bildung säureunlöslicher Niederschläge, welche Salze der Chlorjodverbindungen des   a-aminopyridin   und seiner Derivate darstellen. Diese Salze sind in der Mehrzahl der Fälle gut kristallisiert und recht beständig ; kochen in saurer Lösung zerstört sie nicht, beim Abkühlen scheiden sie sich in prächtigen Kristallen wieder ab. 



   Allen diesen Verbindungen, die zur Darstellung pharmazeutischer Präparate dienen sollen, ist die Fähigkeit gemeinsam, in alkalischer Lösung mit guter Ausbeute in die entsprechenden ss'-Jodderivate überzugehen. 



   Es ist zwar schon bekannt (M. 33 [1912] 967), dass die Chlorhydrate des Chlorjodpyridins bzw.   Chlorjodchinolins   durch Behandeln von Pyridin bzw. Chinolin mit Jod, Salpetersäure und konzentrierter Salzsäure erhalten werden können ; im vorliegenden Fall aber, wo es sich um Aminopyridin bzw. in der Aminogruppe substituierte Pyridine handelt, würden infolge der oxydierenden und nitrierenden Wirkung des angewandten Reagens die Aminogruppe und deren Substituenten weitgehend zerstört werden, keineswegs würde die Chlorjodverbindung des Aminopyridins oder seiner Substitutionsprodukte entstehen. 



   Beispiel 1 :   5'8 g a-Aminopyridin (vg1. Deutsche PatentschriftNr.   362446, Nr. 374291) werden in 40   em3   verdünnter Salzsäure gelöst und mit einer Lösung von 10 g Chlorjod in 20   em3   verdünnter Salzsäure versetzt. Das Chlorhydrat des   N-Chlorjod-a-aminopyridins   fällt in gut ausgebildeten, zitronengelben Kristallen vom   F = 1410 aus   und entspricht der Formel : 
 EMI1.1 
 
Beispiel   2: 8#4 g &alpha;-Acetylaminopyridin (vgl.   Ar. 240,349) werden wie in Beispiel 1 mit   10 g   Chlorjod umgesetzt.

   Das entsprechende, ebenfalls schön gelb gefärbte Salz des   N-Chlorjod- < x-acetyl-   aminopyridins schmilzt bei   1550 und entspricht   der Formel : 
 EMI1.2 
 

 <Desc/Clms Page number 2> 

 
 EMI2.1 
 
 EMI2.2 
 
 EMI2.3 
 erhaltene Chlorhydrat des   N-Chlorjod-&alpha;-diäthylaminopyridins kristallisiert   in rötlich gelben Schuppen vom F = 54-55 . 
 EMI2.4 
 
 EMI2.5 




   <Desc / Clms Page number 1>
 



  Process for the preparation of N-Cl1lOljodverbindungen des (1. -Aminopyridins and its
Derivatives.



   It has been found that α-aminopyridine and its derivatives combine with chloroiodine in acidic solution to form acid-insoluble precipitates which are salts of the chloroiodine compounds of α-aminopyridine and its derivatives. In the majority of cases these salts are well crystallized and quite stable; boiling in an acidic solution does not destroy them, when they cool down they separate out again in splendid crystals.



   All these compounds, which are intended to be used for the production of pharmaceutical preparations, have in common the ability to convert in alkaline solution into the corresponding ß′-iodine derivatives with good yield.



   It is already known (M. 33 [1912] 967) that the chlorohydrates of chloroiodopyridine or chloroiodoquinoline can be obtained by treating pyridine or quinoline with iodine, nitric acid and concentrated hydrochloric acid; In the present case, however, where it is aminopyridine or pyridines substituted in the amino group, the amino group and its substituents would be largely destroyed as a result of the oxidizing and nitrating effect of the reagent used; the chloroiodine compound of aminopyridine or its substitution products would by no means be formed.



   Example 1: 5'8 g of a-aminopyridine (cf. German Patent No. 362446, No. 374291) are dissolved in 40 cubic meters of dilute hydrochloric acid, and a solution of 10 g of chlorine iodine in 20 cubic meters of dilute hydrochloric acid is added. The chlorohydrate of N-chloroiodo-a-aminopyridine precipitates in well-formed, lemon-yellow crystals with F = 1410 and corresponds to the formula:
 EMI1.1
 
Example 2: 8 # 4 g of α-acetylaminopyridine (cf. Ar. 240,349) are reacted as in Example 1 with 10 g of chloroiodine.

   The corresponding, also beautifully yellow colored salt of N-chloroiodine- <x-acetyl- aminopyridine melts at 1550 and corresponds to the formula:
 EMI1.2
 

 <Desc / Clms Page number 2>

 
 EMI2.1
 
 EMI2.2
 
 EMI2.3
 The hydrochloride of N-chloroiodo-α-diethylaminopyridine obtained crystallizes in reddish yellow flakes with an F = 54-55.
 EMI2.4
 
 EMI2.5


 

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von N-Chlorjodverbindungen des a-Aminopyridins und seiner Derivate, dadurch gekennzeichnet, dass a-Aminopyridin bzw. seine Derivate mit Chlorjod in saurer Lösung umgesetzt werden. PATENT CLAIM: Process for the preparation of N-chloroiodine compounds of α-aminopyridine and its derivatives, characterized in that α-aminopyridine or its derivatives are reacted with chloroiodine in acidic solution.
AT119962D 1926-01-15 1926-12-28 Process for the preparation of N-chloroiodine compounds of α-aminopyridine and its derivatives. AT119962B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE119962X 1926-01-15

Publications (1)

Publication Number Publication Date
AT119962B true AT119962B (en) 1930-11-25

Family

ID=5656291

Family Applications (1)

Application Number Title Priority Date Filing Date
AT119962D AT119962B (en) 1926-01-15 1926-12-28 Process for the preparation of N-chloroiodine compounds of α-aminopyridine and its derivatives.

Country Status (1)

Country Link
AT (1) AT119962B (en)

Similar Documents

Publication Publication Date Title
DE10064467C2 (en) Lithium complexes of N- (1-hydroxymethyl-2,3-dihydroxypropyl) -1,4,7-triscarboxymethyl-1,4,7,10-tetraazacyclododecane, their preparation and use
DE1802162A1 (en) New N-pyridylmethylidene homocysteine thiolactone compound and process for its preparation
AT119962B (en) Process for the preparation of N-chloroiodine compounds of α-aminopyridine and its derivatives.
DE876913C (en) Process for the production of synthetic organic products which can be used as anion exchangers
DE1158082B (en) Process for the preparation of alkylenediamine derivatives and their salts
DE874443C (en) Process for the preparation of monoaminobenzenesulfoderivatives of diamines
AT266108B (en) Process for the preparation of the new 6,7-dihyroxycoumarin-4-methylsulfonic acid and its salts
DE1815396B2 (en) N UP 6 - (BENZYL- ALPHA - PENICILLOYL) - N UP 2 - FORMYL -L - LYSINE
CH412887A (en) Process for the preparation of addition salts of 1-methyl-3- (di-2-thienylmethylene) piperidine
DE484835C (en) Process for the preparation of chloroiodine compounds of 2-aminopyridine and its derivatives
AT112128B (en) Process for the preparation of pyridine-mercury compounds.
DE731912C (en) Process for the production of pellets of sulfanilamide
DE532536C (en) Process for the preparation of sulfosalicylic acid compounds of quinine
DE2359256C3 (en) N-Phenyl-N-benzyl-4-amino-1-methylpiperidine citrate, process for its preparation and its use Knoll AG, 6700 Ludwigshafen
DE556748C (en) Process for the production of durable acridine salt solutions
DE535074C (en) Process for the preparation of nitrogenous derivatives of organic mercury compounds
DE679972C (en) Process for the pure production of di- (p-phenetyl) - (2-aethoxypyridyl-5) -guanidine
DE589331C (en) Process for the preparation of rhodanides of heterocyclic quaternary ammonium bases
DE234054C (en)
DE944953C (en) Process for the preparation of a therapeutic agent consisting of the calcium salt of Ca-ethylene diamine tetraacetic acid
AT216671B (en) Process for the preparation of compounds of various penicillins with sulfonamides
AT207381B (en) Process for the production of new pyrvinium salts of pamoic acid
DE1924174C3 (en) Magnesium Orotate Glycinate
AT221501B (en) Process for the preparation of the new 4-chloro-3-sulfamylbenzoic acid and its alkali metal salts
AT159131B (en) Process for the preparation of 9-aminoacridines which are basically substituted in the amino group.