CH243599A - Process for the preparation of the new a, B-di- (N-benzyl-benzimidazyl- (2)) - ethylene. - Google Patents

Process for the preparation of the new a, B-di- (N-benzyl-benzimidazyl- (2)) - ethylene.

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Publication number
CH243599A
CH243599A CH243599DA CH243599A CH 243599 A CH243599 A CH 243599A CH 243599D A CH243599D A CH 243599DA CH 243599 A CH243599 A CH 243599A
Authority
CH
Switzerland
Prior art keywords
ethylene
benzimidazyl
benzyl
new
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH243599A publication Critical patent/CH243599A/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D235/00Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
    • C07D235/02Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
    • C07D235/04Benzimidazoles; Hydrogenated benzimidazoles
    • C07D235/20Two benzimidazolyl-2 radicals linked together directly or via a hydrocarbon or substituted hydrocarbon radical

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Verfahren    zur Herstellung des neuen     a"l3-1)1-[N-benzyl-benzimidazyl-(2)]-äthylens.       Es wurde gefunden, dass man zum neuen       rn,ss-Di-[N-benzyl-benzimidazyl-(2)]-äthylen     gelangt, wenn man 1     Mol        a,ss-Di-[benzimid-          azyl-(2)]-äthylen    mit 2     Mol    eines     Benzylie-          rungsmittels    umsetzt.  



  Als     Benzylierungsmittel    verwendet man  zweckmässig     Benzylchlorid,    welches man vor  teilhaft in Gegenwart eines säurebindenden  Mittels, z. B. unter Zusatz von Alkali  hydrogyd,     einwirken    lässt.  



  Die Umsetzung mit dem     Benzylierungs-          mittel    wird     vorzugsweise    in der Wärme, z. B.  bei 60 bis 100 , vorgenommen.  



  Das neue     a,ss-Di-        [N-benzyl-benzimidazyl-          (2)]-äthylen    bildet feine, hellgefärbte     Nädel-          chen.    Die alkoholische Lösung fluoresziert  im ultravioletten Licht     violettblau.    Die neue  Verbindung kann als optisches Bleichmittel  verwendet werden.    <I>Beispiel:</I>    Man löst 5,2 Teile     a,ss-Di-[benzimidazyl-          (2)]-äthylen    in einer Mischung von 8 Teilen  konzentrierter     Natriumhydrogydlösung    und    50 Teilen Alkohol unter Erwärmen auf 70  bis 75 .

   Zur so erhaltenen Lösung lässt man,  allmählich 5,2     Teile        Benzylchlorid    zufliessen  und erwärmt das Reaktionsgemisch noch  einige Zeit auf 70     bis    75 . Man lässt erkalten,  filtriert das abgeschiedene     a,ss-Di-[N-benzyl-          benzimidazyl-(2)]-äthylen    ab, wäscht mit  Alkohol neutral und trocknet. Das neue Pro  dukt, das aus Alkohol     unter    Zusatz von Tier  kohle weiter     gereinigt    werden kann, bildet  feine, helle     Nädelchen,    die in Wasser unlös  lich sind. Die alkoholische Lösung der neuen  Verbindung fluoresziert     violettblau    im  ultravioletten Licht.



      Process for the preparation of the new a "13-1) 1- [N-benzyl-benzimidazyl- (2)] -ethylene. It has been found that the new rn, ss-di- [N-benzyl-benzimidazyl- (2 )] - ethylene is obtained when 1 mole of a, ss-di- [benzimid- azyl- (2)] - ethylene is reacted with 2 moles of a benzylating agent.



  The benzylating agent used is advantageously benzyl chloride, which can be used in the presence of an acid-binding agent, for. B. with the addition of alkali hydrogyd, can act.



  The reaction with the benzylating agent is preferably carried out in the heat, e.g. B. at 60 to 100 made.



  The new a, ss-di- [N-benzyl-benzimidazyl- (2)] -ethylene forms fine, light-colored needles. The alcoholic solution fluoresces violet-blue in ultraviolet light. The new compound can be used as an optical bleaching agent. <I> Example: </I> 5.2 parts of a, ss-di- [benzimidazyl- (2)] -ethylene are dissolved in a mixture of 8 parts of concentrated sodium hydrogen solution and 50 parts of alcohol while warming to 70 to 75.

   5.2 parts of benzyl chloride are gradually added to the solution thus obtained, and the reaction mixture is heated to 70 to 75 for some time. It is allowed to cool, the precipitated α, β-di- [N-benzylbenzimidazyl- (2)] -ethylene is filtered off, washed neutral with alcohol and dried. The new product, which can be further purified from alcohol with the addition of animal charcoal, forms fine, light-colored needles that are insoluble in water. The alcoholic solution of the new compound fluoresces violet-blue in ultraviolet light.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung des neuen a,ss Di- [N-benzyl-benzimidazyl-(2) ] -äthylens, da durch gekennzeichnet, dass man 1 Mol a,ss- Di- [benzimidazyl - (2)] - äthylen mit 2 Mol eines Benzylierungsmittels umsetzt. PATENT CLAIM: Process for the preparation of the new a, ss di- [N-benzyl-benzimidazyl- (2)] -ethylene, characterized in that one mole of a, ss- di- [benzimidazyl- (2)] - ethylene with Reacts 2 moles of a benzylating agent. Das neue a,ss-Di- [N-benzyl-benzimidazyl- (2)]-äthylen bildet feine, hellgefärbte Nädel- chen. Die alkoholische Lösung fluoresziert im ultravioletten Licht violettblau. Die neue Verbindung kann als optisches Bleichmittel verwendet werden. UNTERANSPRÜCHE 1. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass man als Benzylie- rungsmittel Benzylchlorid verwendet. The new a, ss-di- [N-benzyl-benzimidazyl- (2)] -ethylene forms fine, light-colored needles. The alcoholic solution fluoresces violet-blue in ultraviolet light. The new compound can be used as an optical bleaching agent. SUBClaims 1. Method according to patent claim, characterized in that benzyl chloride is used as the benzylating agent. \?. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass man Benzylchlorid in Gegenwart eines säurebindenden Mittels bei 60 bis 100 einwirken lässt. \ ?. A method according to claim, characterized in that benzyl chloride is allowed to act at 60 to 100 in the presence of an acid-binding agent.
CH243599D 1943-10-28 1943-10-28 Process for the preparation of the new a, B-di- (N-benzyl-benzimidazyl- (2)) - ethylene. CH243599A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH243599T 1943-10-28

Publications (1)

Publication Number Publication Date
CH243599A true CH243599A (en) 1946-07-31

Family

ID=4463685

Family Applications (1)

Application Number Title Priority Date Filing Date
CH243599D CH243599A (en) 1943-10-28 1943-10-28 Process for the preparation of the new a, B-di- (N-benzyl-benzimidazyl- (2)) - ethylene.

Country Status (1)

Country Link
CH (1) CH243599A (en)

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