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Bioorg Med Chem Lett. 2009 Jul 1;19(13):3669-73. doi: 10.1016/j.bmcl.2009.03.150. Epub 2009 Apr 5.

Second generation of BACE-1 inhibitors part 2: Optimisation of the non-prime side substituent.

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Neurology and Gastrointestinal Centre of Excellence for Drug Discovery, GlaxoSmithKline R&D, New Frontiers Science Park, Third Avenue, Harlow, Essex CM19 5AW, United Kingdom.


Our first generation of hydroxyethylamine transition-state mimetic BACE-1 inhibitors allowed us to validate BACE-1 as a key target for Alzheimer's disease by demonstrating amyloid lowering in an animal model, albeit at rather high doses. Finding a molecule from this series which was active at lower oral doses proved elusive and demonstrated the need to find a novel series of inhibitors with improved pharmacokinetics. This Letter describes the discovery of such inhibitors.

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