A series of novel hybrid heterocyclic compounds, 3-(3-alkyl-2,6-diarylpiperin-4-ylidene)-2-thioxoimidazolidin-4-ones were synthesised and a comparative study was also carried out under microwave irradiation. The synthesised compounds were characterised by their melting points, elemental analysis, MS, FT-IR, one-dimensional NMR (1H, D2O exchanged 1H and
Synthesis, spectral analysis and in vitro microbiological evaluation of 3-(3-alkyl-2,6-diarylpiperin-4-ylidene)-2-thioxoimidazolidin-4-ones as a new class of antibacterial and antifungal agents
作者:J. Thanusu、V. Kanagarajan、M. Gopalakrishnan
DOI:10.1016/j.bmcl.2009.11.074
日期:2010.1
In the present work, a new series of bis hybrid heterocycle comprising both piperidine and thiohydantoin nuclei together namely 3-(3-alkyl-2,6-diarylpiperin-4-ylidene)-2-thioxoimidazolidin-4-ones 46-60 was synthesized by the treatment of the respective thiosemicarbazones 31-45 with chloroethyl acetate and anhydrous sodium acetate in refluxing ethanol for 4 h and were characterized by melting point, elemental analysis, MS, FT-IR, one-dimensional NMR (H-1, D2O exchanged H-1 and C-13), two dimensional HOMOCOSY and NOESY spectroscopic data. In addition, the title compounds were screened for their antimicrobial activities against a spectrum of clinically isolated microbial organisms. Compounds 47-50, 52-55 and 57-60 with fluoro, chloro, methoxy or methyl functions at the para position of phenyl rings attached to C-2 and C-6 carbons of piperidine moiety along with and without methyl substituent at position C-3 of the piperidine ring exerted potent biological activities againstStaphylococcus aureus, beta-Hemolytic streptococcus, Vibrio cholerae, Escherichia coli, Pseudomonas aeruginosa, Aspergillus flavus, Candida albicans, Candida 6 and Candida 51 at a minimum inhibitory concentration. (C) 2009 Elsevier Ltd. All rights reserved.
Spectral characterization of novel bis heterocycles comprising both piperidine and thiohydantoin nuclei
作者:J. Thanusu、V. Kanagarajan、M. Gopalakrishnan
DOI:10.1007/s11164-010-0221-7
日期:2010.12
A series of bis heterocycles comprising both piperidine and thiohydantoin nuclei namely 3-(3-alkyl-2,6-diarylpiperin-4-ylidene)-2-thioxoimidazolidin-4-ones is synthesized and characterized by melting point, elemental analysis, MS, FT–IR, one-dimensional NMR (1H, D2O exchanged 1H and 13C), two-dimensional HOMOCOSY, and NOESY spectroscopic data.
通过熔点、元素分析、质谱、傅立叶变换红外光谱、一维核磁共振(1H、D2O 交换 1H 和 13C)、二维 HOMOCOSY 和 NOESY 光谱数据,合成了一系列由哌啶和硫代海因核组成的双杂环,即 3-(3-烷基-2,6-二芳基哌啶-4-亚基)-2-硫酮咪唑烷-4-酮。