Studies on Anti-Helicobacter pylori Agents. Part 1: Benzyloxyisoquinoline Derivatives Original Research Article

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 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 was superior to that of amoxicillin (AMPC) () and clarithromycin (CAM) (). However, 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.