CH192500A - Process for the preparation of 2-ethoxypyridyl-5-azo-3'.5'-diaminopyridine. - Google Patents

Process for the preparation of 2-ethoxypyridyl-5-azo-3'.5'-diaminopyridine.

Info

Publication number
CH192500A
CH192500A CH192500DA CH192500A CH 192500 A CH192500 A CH 192500A CH 192500D A CH192500D A CH 192500DA CH 192500 A CH192500 A CH 192500A
Authority
CH
Switzerland
Prior art keywords
diaminopyridine
azo
ethoxypyridyl
preparation
ethoxy
Prior art date
Application number
Other languages
German (de)
Inventor
Schering-Kahlbaum A G
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
Publication of CH192500A publication Critical patent/CH192500A/en

Links

Description

  

  Verfahren zur Herstellung von     2-äthogy-pyridyl-5-azo-3'.5'-diaminopyridin.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung des neuen     bactericid     wirkenden     Farbstoffes        2-Äthoxy-pyridyl-5-          azo-3'.5'-diarninopyridin,    das dadurch gekenn  zeichnet ist, dass man     diazotiertes        2-Äthoxy-          5-aminopyridin    auf     3.5-Diaminopyridin    ein  wirken lässt. Die neue Verbindung soll als  inneres Desinfektionsmittel therapeutische  Verwendung finden.

           Beispiel:       33 Teile     3,5-Diaminopyridin    werden in  Salzsäure gelöst; hierzu wird eine Lösung  von 4,1     gr        2-Äthoxy-5-aminopyridin    gefügt,  die vorher mit 21 Teilen     Natriumnitrit        diazo-          tiert    wurde. Auf Zusatz von Natronlauge bis    zur alkalischen Reaktion fällt der neue Farb  stoff aus, welcher nach     Umkristallisieren    aus  Alkohol ein orangegelbes Kristallpulver vom       Smp.    2210 darstellt. Ausbeute quantitativ.



  Process for the preparation of 2-ethogy-pyridyl-5-azo-3'.5'-diaminopyridine. The subject of the present patent is a process for the preparation of the new bactericidal dye 2-ethoxy-pyridyl-5-azo-3'.5'-diarninopyridine, which is characterized in that diazotized 2-ethoxy-5-aminopyridine is 3.5- Diaminopyridine can act. The new compound is intended to be used therapeutically as an internal disinfectant.

           Example: 33 parts of 3,5-diaminopyridine are dissolved in hydrochloric acid; a solution of 4.1 g of 2-ethoxy-5-aminopyridine, which was previously diazotized with 21 parts of sodium nitrite, is added to this. Upon addition of sodium hydroxide solution until an alkaline reaction occurs, the new dye precipitates, which after recrystallization from alcohol is an orange-yellow crystal powder with a melting point of 2210. Quantitative yield.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von 2-Äthoxy- pyridyl-5-azo-3'.5'-diaminopyridin, dadurch ge kennzeichnet, dass man diazotiertes 2-Äthoxy- 5-aminopyridin auf 3.5-Diaminopyridin ein wirken lässt. Der neue, bactericid wirkende Farbstoff stellt ein orangegelbes Kristallpulver vom Smp. 221<B>0</B> C dar. PATENT CLAIM: Process for the production of 2-ethoxypyridyl-5-azo-3'.5'-diaminopyridine, characterized in that diazotized 2-ethoxy-5-aminopyridine is allowed to act on 3,5-diaminopyridine. The new, bactericidal dye is an orange-yellow crystal powder with a melting point of 221 <B> 0 </B> C.
CH192500D 1929-11-08 1935-03-29 Process for the preparation of 2-ethoxypyridyl-5-azo-3'.5'-diaminopyridine. CH192500A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH145270T 1929-11-08
DE192500X 1934-04-17

Publications (1)

Publication Number Publication Date
CH192500A true CH192500A (en) 1937-08-15

Family

ID=25714667

Family Applications (1)

Application Number Title Priority Date Filing Date
CH192500D CH192500A (en) 1929-11-08 1935-03-29 Process for the preparation of 2-ethoxypyridyl-5-azo-3'.5'-diaminopyridine.

Country Status (1)

Country Link
CH (1) CH192500A (en)

Similar Documents

Publication Publication Date Title
CH192500A (en) Process for the preparation of 2-ethoxypyridyl-5-azo-3&#39;.5&#39;-diaminopyridine.
CH192499A (en) Process for the preparation of 2-methoxypyridyl-5-azo-3&#39;.5&#39;-diaminopyridine.
DE551094C (en) Process for the preparation of quinoline-8-azo compounds of the quinine series
AT142914B (en) Process for the preparation of ß-iodonaphthol disulfonic acids.
AT107325B (en) Process for the preparation of 2-hydrazino-5-nitropyridine.
DE451730C (en) Process for the preparation of 6-alkoxy-8-aminoquinolines
AT92407B (en) Process for the preparation of 1-allyl-3,7-dimethylxanthine.
CH299273A (en) Process for the production of a thiosemicarbazone.
CH193536A (en) Process for the preparation of bromobenzene-4-azo-3&#39;.5&#39;-diaminopyridine.
CH192502A (en) Process for the preparation of chlorobenzene-3-azo-3&#39;.5&#39;-diaminopyridine.
CH176225A (en) Process for the preparation of 2-chloro-2&#39;-aminoazobenzene.
CH239147A (en) Process for the production of a new benzene sulfonamide derivative.
CH183121A (en) Process for the preparation of a heterocyclic mercury compound.
CH208255A (en) Process for the preparation of an imidazoline derivative.
CH204744A (en) Process for the preparation of an imidazole dihydride (4,5) substituted in the 2-position.
CH284072A (en) Process for the preparation of 3,4-dimethyl-5-phenyl-2-imino-thiazolidine.
CH230596A (en) Process for the preparation of a salt of N1- (3,4-dimethylbenzoyl) -p-aminobenzenesulfonamide.
CH125403A (en) Process for the preparation of a substituted quinoline carboxylic acid derivative.
CH100479A (en) Process for the production of a new azo dye.
CH295836A (en) Process for the preparation of a product of the thiosemicarbazone series.
CH192501A (en) Process for the preparation of chlorobenzene-4-azo-3&#39;.5&#39;-diaminopyridine.
CH339624A (en) Process for the preparation of a drug compound
CH148958A (en) Process for the preparation of a basic ether of the pyridine series.
CH188235A (en) Process for the preparation of a heterocyclic mercury compound.
CH243013A (en) Process for the preparation of a p-amino-benzenesulfonacylamide.