Synthesis of new bioactive venlafaxine analogs: novel thiazolidin-4-ones as antimicrobials.
A one-pot, three-component, microwave irradiated and conventional solution-phase synthesis of bioactive venlafaxine analogs such as 2,3-disubstituted-1,3-thiazolidin-4-ones 3a-j under mild conditions and their characterization are reported. The novel thiazolidin-4-ones, 3-(2-(1-hydroxycyclohexyl)-2-(4-methoxyphenyl)ethyl)-2-phenyl-thiazolidin-4-one 3a, 2-(2,6-difluorophenyl)-3-(2-(1-hydroxycyclohexyl)-2-(4-methoxyphenyl)ethyl)thiazolidin-4-one 3c, and 2-(furan-2-yl)-3-(2-(1-hydroxycyclohexyl)-2-(4-methoxyphenyl)ethyl)thiazolidin-4-one 3i, were characterized by the single crystal X-ray diffraction method. The cyclohexane ring of all the three molecules is in chair conformation. All the synthesized compounds were screened for their efficacy as antimicrobials in vitro by the disk diffusion and microdilution method against pathogenic strains such as Bacillus subtilis, Escherichia coli, Pseudomonas fluorescens, Xanthomonas campestris pvs, Xanthomonas oryzae, Aspergillus niger, Aspergillus flavus, Fusarium oxysporum, Trichoderma species, and Fusarium monaliforme species. Among these compounds 3c, 3j, 3g, 3d, and 3e showed potent antimicrobial activity, when compared to standard drugs.
Kavitha
C V
CV
Department of Studies in Chemistry, University of Mysore, Manasagangothri, Mysore 570006, India.
Basappa
Swamy
S Nanjunda
SN
Mantelingu
K
K
Doreswamy
S
S
Sridhar
M A
MA
Shashidhara Prasad
J
J
Rangappa
Kanchugarakoppal S
KS
D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D018360:Crystallography, X-Ray; D003511:Cyclohexanols / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D066298:In Vitro Techniques; D008826:Microbial Sensitivity Tests; D008958:Models, Molecular; D015394:Molecular Structure; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D013844:Thiazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D000069470:Venlafaxine Hydrochloride
D000900:Anti-Bacterial Agents; D003511:Cyclohexanols; D013844:Thiazoles; D000069470:Venlafaxine Hydrochloride