CH237554A - Process for the preparation of a new benzimidazole derivative. - Google Patents

Process for the preparation of a new benzimidazole derivative.

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Publication number
CH237554A
CH237554A CH237554DA CH237554A CH 237554 A CH237554 A CH 237554A CH 237554D A CH237554D A CH 237554DA CH 237554 A CH237554 A CH 237554A
Authority
CH
Switzerland
Prior art keywords
benzimidazole derivative
new
preparation
new benzimidazole
agent
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH237554A publication Critical patent/CH237554A/en

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Description

  

      Verfahren    zur Herstellung eines neuen     Benzimidazolderivates.       Es wurde gefunden, dass man zu einem       neuenBenzimidazolderivat    gelangt,     wennman          N-Methylolacetamidsulfonsäure    auf     a,ss-Di-          [benzimidazyl-(2)]-äthylen    in Gegenwart  eines     Kondensationsmittels    einwirken lässt.  



  Als Kondensationsmittel kann man zum  Beispiel eine Säure, wie Schwefelsäure, Salz  säure, ferner Zinkchlorid, verwenden.  



  Die Kondensation wird zweckmässig bei  niedriger Temperatur, zum Beispiel bei 0 bis  20 , vorgenommen.  



  Das     Natriumsalz    des     neuenKondensations-          produktes    stellt ein helles Pulver dar, dessen       wässrige    Lösungen     im    ultravioletten Licht  violett fluoreszieren. Es kann als     Tegtil-          hilfsstoff,    zum Beispiel als optisches Bleich  mittel, verwendet werden.  



  <I>Beispiel:</I>  Zu 100 Teilen     Schwefelsäuremonohydrat          i    fügt man bei 5-10  5,2 Teile     a,ss-Di-[benz-          imidazyl-,(2)]-äthylen,        kühlt    auf     0-5"    ab  und gibt langsam 10 Teile     methylolacetamid-          snlfonsaures    Natrium hinzu. Man rührt    6 Stunden bei 0-5  und lässt hierauf die  Temperatur langsam auf etwa 20  steigen.

    Sobald sich eine Probe in Wasser löst, giesst  man auf Eiswasser, scheidet das neue Kon  densationsprodukt mit     aussalzenden        Mitteln,     zum Beispiel mit     Natriumchlorid,    ab, filtriert  und wäscht mit     Natriumchloridlösung.    Den  Filterrückstand nimmt man mit Wasser auf,  neutralisiert     mit,Sodalösung    und dampft zur  Trockne ein. Man erhält ein hellgefärbtes  Pulver, das in Wasser löslich ist. Die     wäss-          rige    Lösung fluoresziert im ultravioletten  Licht violett.



      Process for the preparation of a new benzimidazole derivative. It has been found that a new benzimidazole derivative is obtained if N-methylolacetamide sulfonic acid is allowed to act on α, ß-di- [benzimidazyl- (2)] -ethylene in the presence of a condensing agent.



  As a condensing agent, for example, an acid such as sulfuric acid, hydrochloric acid and zinc chloride can be used.



  The condensation is expediently carried out at a low temperature, for example from 0 to 20.



  The sodium salt of the new condensation product is a light powder, the aqueous solutions of which fluoresce violet in ultraviolet light. It can be used as a textile additive, for example as an optical bleaching agent.



  <I> Example: </I> To 100 parts of sulfuric acid monohydrate i, 5.2 parts of a, ss-di- [benzimidazyl-, (2)] - ethylene are added at 5-10, and the mixture is cooled to 0-5 " and slowly add 10 parts of sodium methylolacetamide-sulfonic acid, stir for 6 hours at 0-5 and then let the temperature rise slowly to about 20.

    As soon as a sample dissolves in water, it is poured onto ice water, the new condensation product is separated out with salting-out agents, for example with sodium chloride, filtered and washed with sodium chloride solution. The filter residue is taken up with water, neutralized with soda solution and evaporated to dryness. A light-colored powder which is soluble in water is obtained. The aqueous solution fluoresces violet in ultraviolet light.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Benzimidazolderivates, dadurch gekennzeich net, dass man N-Methylolacetamidsulfonsäure auf ä,ss-Di-[benzimidazyl-(2)]-äthylen in Gegenwart eines Kondensationsmittels ein wirken lässt. DasNatriumsalz des neuenKondensations- produktes stellt ein helles Pulver dar, dessen wässrige Lösungen im ultravioletten Licht violett fluoreszieren. PATENT CLAIM: Process for the production of a new benzimidazole derivative, characterized in that N-methylolacetamidesulfonic acid is allowed to act on a, s-di- [benzimidazyl- (2)] -ethylene in the presence of a condensing agent. The sodium salt of the new condensation product is a light powder, the aqueous solutions of which fluoresce violet in ultraviolet light. Es kann als Textilhilfs- stoff, zum Beispiel als optisches Bleichmit tel, verwendet werden. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man als Kondensations- mittel konzentrierte Sehwefelsäure verwendet und bei niedriger Temperatur arbeitet. It can be used as a textile auxiliary, for example as an optical bleaching agent. SUBSTANTIAL CLAIM: Process according to patent claim, characterized in that concentrated sulfuric acid is used as the condensation agent and it is operated at a low temperature.
CH237554D 1942-12-23 1942-12-23 Process for the preparation of a new benzimidazole derivative. CH237554A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH237554T 1942-12-23
CH235570T 1943-10-28

Publications (1)

Publication Number Publication Date
CH237554A true CH237554A (en) 1945-04-30

Family

ID=25728019

Family Applications (1)

Application Number Title Priority Date Filing Date
CH237554D CH237554A (en) 1942-12-23 1942-12-23 Process for the preparation of a new benzimidazole derivative.

Country Status (1)

Country Link
CH (1) CH237554A (en)

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