Synthesis and Biological Activities of 2,6-Diaryl-3methyl-4-piperidone Derivatives.
作者:Natesh Rameshkumar、Anantharaman Veena、Raju Ilavarasan、Mandaleeswaran Adiraj、Pitchaimuthu Shanmugapandiyan、Seshaiah Krishnan Sridhar
DOI:10.1248/bpb.26.188
日期:——
In the present study, a new series of 2,6-diaryl-3-methyl-4-piperidones was synthesized by Mannich reaction (condensation) of ethyl–methyl ketone, substituted aromatic aldehydes and ammonium acetate. Oximes and thiosemicarbazone derivatives of 2,6-diaryl-3-methyl-4-piperidones were synthesized by reaction with hydroxylamine hydrochloride and thiosemicarbazide respectively. The chemical structures were confirmed by means of IR, 1H-, 13C-NMR and mass spectral data. The compounds were screened for acute toxicity, analgesic, local anaesthetic and antifungal activity. 2-(4-Methylphenyl)-3-methyl-6-(4-chlorophenyl)-piperidin-4-one 2 exhibited the highest analgesic and local anaesthetic activity. The oximes and thiosemicarbazones were completely devoid of analgesic and local anaesthetic activity. 2-(4-Methylphenyl)-3-methyl-6-(4-hydroxyphenyl)-piperidin-4-oxime 21 and 2-(4-methoxyphenyl)-3-methyl-6-(4-chlorophenyl)-piperidin-4-oxime 17 exhibited potent antifungal activity against Aspergillus niger. Antifungal activity against Candida albicans was observed only with 2-(4-dimethylaminophenyl)-3-methyl-6-(4-chlorophenyl)-piperidin-4-oxime 20. 2,6-Diaryl-3-methyl-4-piperidones did not exhibit antifungal property.
在本研究中,通过Mannich反应(缩合反应)合成了一系列新的2,6-二芳基-3-甲基-4-哌啶酮,该反应涉及乙基-甲基酮、取代芳香醛和醋酸铵。通过分别与氢氧化铵和硫代脲的反应合成了2,6-二芳基-3-甲基-4-哌啶酮的肟和硫代脲衍生物。化学结构通过红外光谱、氢谱、碳谱和质谱数据进行了确认。对这些化合物进行了急性毒性、镇痛、局部麻醉和抗真菌活性筛选。2-(4-甲基苯基)-3-甲基-6-(4-氯苯基)-哌啶-4-酮2显示了最高的镇痛和局部麻醉活性。肟和硫代脲完全不具备镇痛和局部麻醉活性。2-(4-甲基苯基)-3-甲基-6-(4-羟基苯基)-哌啶-4-肟21和2-(4-甲氧基苯基)-3-甲基-6-(4-氯苯基)-哌啶-4-肟17对黑曲霉表现出强的抗真菌活性。对白色念珠菌的抗真菌活性仅在2-(4-二甲氨基苯基)-3-甲基-6-(4-氯苯基)-哌啶-4-肟20中观察到。2,6-二芳基-3-甲基-4-哌啶酮未表现出抗真菌特性。