Referenced in: none

Automatically associated channels: Kv11.1

Title: Core refinement toward permeable β-secretase (BACE-1) inhibitors with low hERG activity.

Authors: Tobias Ginman, Jenny Viklund, Jonas Malmström, Jan Blid, Rikard Emond, Rickard Forsblom, Anh Johansson, Annika Kers, Fredrik Lake, Fernando Sehgelmeble, Karin J Sterky, Margareta Bergh, Anders Lindgren, Patrik Johansson, Fredrik Jeppsson, Johanna Fälting, Ylva Gravenfors, Fredrik Rahm

Journal, date & volume: J. Med. Chem., 2013 Jun 13 , 56, 4181-205

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/23126626

Abstract
By use of iterative design aided by predictive models for target affinity, brain permeability, and hERG activity, novel and diverse compounds based on cyclic amidine and guanidine cores were synthesized with the goal of finding BACE-1 inhibitors as a treatment for Alzheimer's disease. Since synthesis feasibility had low priority in the design of the cores, an extensive synthesis effort was needed to make the relevant compounds. Syntheses of these compounds are reported, together with physicochemical properties and structure-activity relationships based on in vitro data. Four crystal structures of diverse amidines binding in the active site are deposited and discussed. Inhibitors of BACE-1 with 3 μM to 32 nM potencies in cells are shown, together with data on in vivo brain exposure levels for four compounds. The results presented show the importance of the core structure for the profile of the final compounds.