Synthesis and Pharmacological Activity of Triazole Derivatives Inhibiting Eosinophilia
摘要:
In order to develop novel antiasthmatic agents based on a new mechanism of action, a series of 3-substituted 5-amino-1-[(methylamino)(thiocarbonyl)]-1H-1,2,4-triazole derivatives were synthesized and evaluated in a model in which eosinophilia was induced in the ah-way through intravenous (iv) injection of Sephadex particles on days 0, 2, and 5. After screening of several hundred derivatives, we finally identified the highly potent eosinophilia inhibitor 5-amino-3-(4-chlorophenyl)-1-[(methylamino)(thiocarbonyl)]-1H-triazole (23c, GCC-AP0341), which had ID50 values of 0.3 and 0.07 mg/kg when administered orally (os) and intraperitoneally tip), respectively. This compound showed complete inhibition of the hypersensitivity induced by ascaris inhalation at an ip dose of 1 mg/kg as well as low toxicity, with an LD(50) value of > 2.0 g/kg in mice. Extensive study of its mechanism of action revealed that 23c inhibited eosinophil survival induced by interleukin-5 (IL-5), but had little or no effect on leukotriene D-4 (LTD(4)) or platelet-activating factor (PAF)-induced responses. Taken together, these results suggest 23e as a novel candidate for the treatment of chronic asthma. Further studies are now underway.
Synthesis and Pharmacological Activity of Triazole Derivatives Inhibiting Eosinophilia
摘要:
In order to develop novel antiasthmatic agents based on a new mechanism of action, a series of 3-substituted 5-amino-1-[(methylamino)(thiocarbonyl)]-1H-1,2,4-triazole derivatives were synthesized and evaluated in a model in which eosinophilia was induced in the ah-way through intravenous (iv) injection of Sephadex particles on days 0, 2, and 5. After screening of several hundred derivatives, we finally identified the highly potent eosinophilia inhibitor 5-amino-3-(4-chlorophenyl)-1-[(methylamino)(thiocarbonyl)]-1H-triazole (23c, GCC-AP0341), which had ID50 values of 0.3 and 0.07 mg/kg when administered orally (os) and intraperitoneally tip), respectively. This compound showed complete inhibition of the hypersensitivity induced by ascaris inhalation at an ip dose of 1 mg/kg as well as low toxicity, with an LD(50) value of > 2.0 g/kg in mice. Extensive study of its mechanism of action revealed that 23c inhibited eosinophil survival induced by interleukin-5 (IL-5), but had little or no effect on leukotriene D-4 (LTD(4)) or platelet-activating factor (PAF)-induced responses. Taken together, these results suggest 23e as a novel candidate for the treatment of chronic asthma. Further studies are now underway.
Notiz über die Reaktion von Methylhydrazin mit<i>N</i>-Cyano-azomethinen. Abhängigkeit des Reaktionsverlaufs von der Natur der Abgangsgruppe
作者:Haukur Kristinsson、Tammo Winkler
DOI:10.1002/hlca.19830660416
日期:1983.6.15
The reaction of methylhydrazine with N-cyanoazomethines 1 containing a thioalkyl leaving group yields the 3-amino-1,2,4-triazole derivatives 2, whereas the N-cyanoazomethines 1 containing an alkoxy leaving group give the isomeric 5-amino-1,2,4-triazoles 3. The yields are excellent and the position selectivity is high. The structures of the 1,2,4-triazole derivatives were determined with the aid of
Synthese von [1,2,4]Triazolo [1,5-a]chinazolinen. Ableitung der Konformation von Substituenten mit Hilfe der13C-NMR.-Spektroskopie
作者:Roland Heckendorn、Tammo Winkler
DOI:10.1002/hlca.19800630102
日期:1980.1.23
Synthesis of [1,2,4]Triazolo[1,5-a]quinazolines. Assignment of the Conformation of Substituents with the Aid of 13C-NMR. Spectroscopy
[1,2,4]三唑并[1,5- a ]喹唑啉的合成。借助13 C-NMR进行取代基构象的分配。光谱学
Facile and Convenient Synthesis of 1‐Perfluoroalkyl‐1,2,4‐triazoles
作者:M. Kammoun、A. Chihi、B. Hajjem、M. Bellassoued
DOI:10.1080/00397910701651367
日期:2007.12.1
Abstract Treatment of N‐methylcarbonyl 1, N‐phenylthioamido 2, and N‐cyano 3 iminoethers with perfluoroalkylated hydrazines leads to 1‐perfluoroalkyl‐5‐methyl‐1,2,4‐ triazoles, 4,1‐perfluoroalkyl‐5‐phenylamino‐1,2,4‐triazoles 5, and 1‐perfluoroalkyl‐5‐amino‐1,2,4‐triazoles 6 in good yields. These compounds are screened for their biological activities.