Cited by 40Alzheimer's disease research and treatmentsCholinesterase and Neurodegenerative DiseasesDementia and Cognitive Impairment Research

Discovery of Umibecestat (CNP520): A Potent, Selective, and Efficacious β-Secretase (BACE1) Inhibitor for the Prevention of Alzheimer’s Disease

Machauer, Rainer, Lueoend, Rainer, Hurth, Konstanze, Veenstra, Siem J., Rueeger, Heinrich, Voegtle, Markus, Tintelnot-Blomley, Marina, Rondeau, Jean-Michel +4 more·2021·Journal of Medicinal Chemistry

Abstract

After identification of lead compound 6, 5-amino-1,4-oxazine BACE1 inhibitors were optimized in order to improve potency, brain penetration, and metabolic stability. Insertion of a methyl and a trifluoromethyl group at the 6-position of the 5-amino-1,4-oxazine led to 8 ( NB-360 ), an inhibitor with a p K a of 7.1, a very low P-glycoprotein efflux ratio, and excellent pharmacological profile, enabling high central nervous system penetration and exposure. Fur color changes observed with NB-360 in efficacy studies in preclinical animal models triggered further optimization of the series. Herein, we describe the steps leading to the discovery of 3-chloro-5-trifluoromethyl-pyridine-2-carboxylic acid [6-((3 R,6 R )-5-amino-3,6-dimethyl-6-trifluoromethyl-3,6-dihydro-2 H -[1,4]oxazin-3-yl)-5-fluoro-pyridin-2-yl]amide 15 ( CNP520, umibecestat ), an inhibitor with superior BACE1/BACE2 selectivity and pharmacokinetics. CNP520 reduced significantly Aβ levels in mice and rats in acute and chronic treatment regimens without any side effects and thus qualified for Alzheimer’s disease prevention studies in the clinic.

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Crossref · 10.1021/acs.jmedchem.1c01300

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54 of 54 references verified0 citation errors · 0 not checkable

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  • CNP520 (umibecestat) has been shown to reduce burden of amyloid-beta plaques in preclinical animals and is currently undergoing testing phases.

    “Similar to other BACE-1 inhibitors, CNP520 (umibecestat (labeled as 11, Figure 5)) has been shown to reduce the burden of amyloid-beta plaques in preclinical animals; it is presently undergoing testing phases [157,166,167].”

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Authors
Machauer, R., Lueoend, R., Hurth, K., Veenstra, S. J., Rueeger, H., Voegtle, M., Tintelnot-Blomley, M., Rondeau, J.-M., Jacobson, L. H., Laue, G., Beltz, K., & Neumann, U.
Affiliations
  • Novartis (Switzerland) (CH)
  • Global Discovery Chemistry, Novartis Pharma AG, CH-4056 Basel, Switzerland
Corresponding author
Machauer, Rainer
Venue
Journal of Medicinal Chemistry
Published
2021-10-14
Volume
64
Issue
20
Pages
15262-15279
ISSN
  • 0022-2623 (ISSN-L)
  • 1520-4804
OpenAlex
W3206453397
Cited by
40
References
54
Citations by year
2026: 7 · 2025: 7 · 2024: 11 · 2023: 12 · 2022: 2 · 2021: 1
FWCI
4.08
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Medicinal Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • The Novartis Repository (Novartis) (submittedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Pharmacology › Cholinesterase and Neurodegenerative Diseases
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
BACE1 inhibitors, Alzheimer's disease prevention, P-glycoprotein efflux, brain penetration, pharmacokinetics, structure-activity optimization, trifluoromethyl substitution
MeSH terms
Alzheimer Disease, Animals, Cell Line, Dogs, Dose-Response Relationship, Drug, Enzyme Inhibitors, Humans, Male, Mice, Inbred C57BL, Oxazines, Structure-Activity Relationship, Molecular Structure, Aspartic Acid Endopeptidases, Rats, Sprague-Dawley, Mice, Rats, Amyloid Precursor Protein Secretases, Drug Discovery

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