title: Studies on anti-Helicobacter pylori agents. Part 1: Benzyloxyisoquinoline derivatives.
abstract: The synthesis and optimization of the anti-Helicobacter pylori activity of a novel series of benzyloxyisoquinoline derivatives that was discovered by a random screening process, are described. In the in vitro assay, compound 10c containing a 3-acetamido-2,6-dichlorobenzyl substituent was found to have extremely potent activity against H. pylori and no activity against other common bacteria. The anti-H. pylori activity of 10c was superior to that of amoxicillin (AMPC) (1) and clarithromycin (CAM) (2). However, 10c did not show in vivo efficacy in a mouse infection model; a feature attributed to the lack of strong bactericidal activity at short contact times.
authors.affiliation: Medicinal Chemistry Research Laboratories, Fujisawa Pharmaceutical Co., Ltd., Osaka, Japan. yoshiki_yoshida@po.fujisawa.co.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshida
authors.forename: D
authors.initials: D
authors.lastname: Barrett
authors.forename: H
authors.initials: H
authors.lastname: Azami
authors.forename: C
authors.initials: C
authors.lastname: Morinaga
authors.forename: S
authors.initials: S
authors.lastname: Matsumoto
authors.forename: Y
authors.initials: Y
authors.lastname: Matsumoto
authors.forename: H
authors.initials: H
authors.lastname: Takasugi
mesh_terms: D000658:Amoxicillin / Q000494:pharmacology; D000818:Animals; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D004195:Disease Models, Animal; D016481:Helicobacter Infections / Q000188:drug therapy; D016480:Helicobacter pylori / Q000187:drug effects* / Q000502:physiology; D007546:Isoquinolines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D051379:Mice; D008813:Mice, Inbred ICR; D008826:Microbial Sensitivity Tests; D010406:Penicillins / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D000900:Anti-Bacterial Agents; D007546:Isoquinolines; D010406:Penicillins; D000658:Amoxicillin