title: Synthesis and antipicornavirus activity of (R)- and (S)-1-[5-(4'-chlorobiphenyl-4-yloxy)-3-methylpentyl]-3-pyridin-4-yl-imidazolidin-2-one.
abstract: The new pyridyl imidazolidinone derivative, 1-[5-(4'-chlorobiphenyl-4-yloxy)-3-methylpentyl]-3-pyridin-4-yl-imidazolidin-2-one (+/-)-1a, was synthesized and found to have an excellent antiviral activity against EV71 (IC50 = 0.009 microM). Therefore, both the enantiomers, (S)-(+)-1a and (R)-(-)-1a, have been prepared starting from readily available monomethyl (R)-3-methylglutarate (7) as a useful chiral building block and their antiviral activity was evaluated in a plaque reduction assay. Interestingly, we observed that the enantiomer (S)-(+)-1a was 10-fold more active against enterovirus71 (EV71) (IC50 = 0.003 microM) than the corresponding enantiomer (R)-(-)-1a (IC50 = 0.033 microM). Similar results were found against all five strains (1743, 2086, 2231, 4643, and BrCr) of EV71 tested. This demonstrated that the absolute configuration of the chiral carbon atom at the 3-position of the alkyl linker considerably influenced the anti-EV71 activity of these pyridyl imidazolidinones.
authors.affiliation: Division of Biotechnology and Pharmaceutical Research, National Health Research Institutes, 35 Keyan Road, Zhunan Town, Miaoli County 350, Taiwan, ROC. jhchen@nhri.org.tw
authors.forename: Jyh-Haur
authors.initials: JH
authors.lastname: Chern
authors.forename: Chih-Shiang
authors.initials: CS
authors.lastname: Chang
authors.forename: Chia-Liang
authors.initials: CL
authors.lastname: Tai
authors.forename: Yen-Chun
authors.initials: YC
authors.lastname: Lee
authors.forename: Chung-Chi
authors.initials: CC
authors.lastname: Lee
authors.forename: Iou-Jiun
authors.initials: IJ
authors.lastname: Kang
authors.forename: Ching-Yin
authors.initials: CY
authors.lastname: Lee
authors.forename: Shin-Ru
authors.initials: SR
authors.lastname: Shih
mesh_terms: D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D045744:Cell Line, Tumor; D004353:Drug Evaluation, Preclinical; D006801:Humans; D048289:Imidazolidines / Q000138:chemical synthesis* / Q000494:pharmacology; D020128:Inhibitory Concentration 50; D007659:Ketones; D010849:Picornaviridae / Q000187:drug effects*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: D000998:Antiviral Agents; D048289:Imidazolidines; D007659:Ketones