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Benzimidazol-Derivate und verwandte Heterocyclen. IV. Die Kondensation von o-Phenylendiamin mit α-Aryl- und γ-Aryl-acetessigester

✍ Scribed by A. Rossi; A. Hunger; J. Kebrle; K. Hoffmann


Publisher
John Wiley and Sons
Year
1960
Tongue
German
Weight
591 KB
Volume
43
Category
Article
ISSN
0018-019X

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✦ Synopsis


Heiiii Kingschluss zu cleiii i n Tab. 2 angrgc.b,cnen I~cnziinidazol-Derivat LXXI muss auf 210-215" erhitzt werden. Die analytischen Dateii stamiiicii aus unseren mikroanalytischen Laboratorieii (Dres. H. GYSEL und \V. PADOTVETZ) und die L.1' bsorptionsspektren ails dem physikalisch-cliemischeI1 Laboratoriuni (Dres. R . ROMF:TSCH u n d H, HURZELER). Allen diescn Herrcn danken wir fur ihrc bereitwillige Hilfe. s L;hIM.il<Y ,. 1 he synthesis of a series of l-aiiiinoalkyl-2-bciizyl-nitro-bt:nzimid~zoles is descri- bed. Many of thc 5-nitro-benzimidazoles prepared show strong analgesic activity. l-(~-Diethylamino-ethyl)-2-(p-ethox~-benzyl)-.j-nitr-o-benziniidazole (XXXVIII) is 1000 times as potent as morphine and therefore the most active analgesic known until now. I'orscliungs1aboratoric.n tlcr CIRA AI<TIENC;ESELLSCH.~I;


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Benzimidazol-Derivate und verwandte Hete
✍ A. Rossi; A. Hunger; J. Kebrle; K. Hoffmann 📂 Article 📅 1960 🏛 John Wiley and Sons 🌐 German ⚖ 884 KB

## Abstract The products of the condensation of o‐phenylenediamine with ethyl acetoacetate were re‐investigated. Depending on the reaction conditions, 2‐methylbenzimidazole (II), 2‐isopropenyl‐benzimidazole‐2‐one (VI) and 4,7‐dihydro‐5‐methyl‐1__H__‐2,3‐benzo‐1,4‐diazepin‐7‐one (IV) were obtained.