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.Info
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
- C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
- C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
- C07D235/20—Two 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)
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) |
-
1943
- 1943-10-28 CH CH243599D patent/CH243599A/en unknown
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