Aryl azoles with neuroprotective activity—Parallel synthesis and attempts at target identification
摘要:
A parallel synthesis of aryl azoles with neuroprotective activity is described. All compounds obtained were evaluated in an in vitro assay using a NMDA toxicity paradigm showing a neuroprotective activity between 15% and 40%. The potential biological target of the active compounds was investigated by extensive literature searches based around similar scaffolds with reported neuroprotective activity. The most interesting molecules active in the NMDA toxicity assay (3a and 2g) showed moderate but significant activity in the inhibition of the Site 2 Sodium Channel binding assay at 10 mu M. To confirm our hypothesis compounds 3a, c, f and 2g were tested in the Veratridine assay which is one of the excitotoxicity assays of revelance to NaV channels. The compounds tested showed an activity between 40% and 70%. The identification of neuroprotective small molecules and the identification of NaV channels as the potential site of action were the most important goals of this work. (c) 2007 Elsevier Ltd. All rights reserved.
Heterocycles. 3. Synthesis and spectral data of some 2-pyrazolines
作者:Nizar R. El-Rayyes、George H. Hovakeemian、Hayat S. Hmoud
DOI:10.1021/je00036a038
日期:1984.4
Heterocycles: 2—Regiospecific addition of methylhydrazine to acetylenic ketones
作者:N. R. El-Rayyes、G. H. Hovakeemian、H. Hammoud
DOI:10.1002/omr.1270210404
日期:1983.4
AbstractThe reaction of 1‐p‐methoxyphenyl‐3‐phenyl‐2‐propen‐1‐one and 3‐p‐methoxyphenyl‐1‐phenyl‐2‐propen‐1‐one with methylhydrazine gave 1‐methyl‐3‐p‐methoxyphenyl‐5‐phenylpyrazoline and 1‐methyl‐3‐phenyl‐5‐p‐methoxyphenylpyrazoline, respectively. These compounds, on oxidation, gave 1‐methyl‐3‐p‐methoxyphenyl‐5‐phenylpyrazole(2) and 1‐methyl‐3‐phenyl‐5‐p‐methoxyphenylpyrazole, respectively. When methyl‐hydrazine was made to react with 1‐p‐methoxyphenyl‐3‐phenyl‐2‐propyn‐1‐one, a pyrazole was obtained which proved to be identical with 2. Confirmatory evidence for this identity was obtained from their spectral data.
EL-RAYYES, NIZAR, R.;HOVAKEEMIAN, G. H.;HMOUD, HAYAT, S., J. CHEM. AND ENG. DATA, 1984, 29, N 2, 225-229
作者:EL-RAYYES, NIZAR, R.、HOVAKEEMIAN, G. H.、HMOUD, HAYAT, S.
DOI:——
日期:——
A Straightforward Synthesis of Pyrazolines and Pyrazoles: Palladium-Catalyzed Carbonylative Vinylation-Cyclocondensation Reactions of Aryl Halides
作者:Xiao-Feng Wu、Helfried Neumann、Matthias Beller
DOI:10.1002/ejoc.201100654
日期:2011.7.19
A novel consecutive one-pot synthesis of pyrazolines and pyrazoles starting from simple arylhalides, styrenes, carbon monoxide, and hydrazines has been established. Palladium-catalyzedcarbonylative vinylation of arylhalides gave the corresponding chalcones, which are trapped in situ by addition of hydrazines.
A parallel synthesis of aryl azoles with neuroprotective activity is described. All compounds obtained were evaluated in an in vitro assay using a NMDA toxicity paradigm showing a neuroprotective activity between 15% and 40%. The potential biological target of the active compounds was investigated by extensive literature searches based around similar scaffolds with reported neuroprotective activity. The most interesting molecules active in the NMDA toxicity assay (3a and 2g) showed moderate but significant activity in the inhibition of the Site 2 Sodium Channel binding assay at 10 mu M. To confirm our hypothesis compounds 3a, c, f and 2g were tested in the Veratridine assay which is one of the excitotoxicity assays of revelance to NaV channels. The compounds tested showed an activity between 40% and 70%. The identification of neuroprotective small molecules and the identification of NaV channels as the potential site of action were the most important goals of this work. (c) 2007 Elsevier Ltd. All rights reserved.