Acyl Guanidine Inhibitors of β-Secretase (BACE-1): Optimization of a Micromolar Hit to a Nanomolar Lead via Iterative Solid- and Solution-Phase Library Synthesis
摘要:
This report describes the discovery and optimizition of a BACE-1 inhibitor series containing an unusual acyl guanidine chemotype that was originally synthesized as part of a 6041-membered solid-phase library. The synthesis of multiple follow-up solid- and solution-phase libraries facilitated the optimization of the original micromolar hit into a single-digit nanomolar BACE-1 inhibitor in both radioligand binding and cell-based functional assay formats. The X-ray structure of representative inhibitors bound to BACE-1 revealed a number of key ligand:protein interactions, including a hydrogen bond between the side chain amide of flap residue Gln73 and the acyl guanidine carbonyl group, and a cation-pi interaction between Arg235 and the isothiazole 4-methoxyphenyl substituent. Following subcutaneous administration in rats, an acyl guanidine inhibitor with single-digit nanomolar activity in cells afforded good plasma exposures and a dose-dependent reduction in plasma A beta levels, but poor brain exposure was observed (likely due to Pgp-mediated efflux), and significant reductions in brain A beta levels were not obtained.
Aminoacetamide acyl guanidines as beta-secretase inhibitors
申请人:Gerritz Samuel
公开号:US20060287287A1
公开(公告)日:2006-12-21
There is provided a series of substituted acyl guanidines of Formula (Ik)
or a stereoisomer; or a pharmaceutically acceptable salt thereof, wherein R
2
, R
3
, R
4
, R
5
, R
25
, R
26
and R
27
as defined herein, their pharmaceutical compositions and methods of use. These compounds inhibit the processing of amyloid precursor protein (APP) by β-secretase and, more specifically, inhibit the production of Aβ-peptide. The present disclosure is directed to compounds useful in the treatment of neurological disorders related to β-amyloid production, such as Alzheimer's disease and other conditions affected by anti-amyloid activity.
There is provided a series of substituted acyl guanidines of Formula (I)
or a stereoisomer; or a pharmaceutically acceptable salt thereof, wherein R
1
, R
2
, R
3
, R
4
and R
5
as defined herein, their pharmaceutical compositions and methods of use. These compounds inhibit the processing of amyloid precursor protein (APP) by β-secretase and, more specifically, inhibit the production of Aβ-peptide. The present disclosure is directed to compounds useful in the treatment of neurological disorders related to β-amyloid production, such as Alzheimer's disease and other conditions affected by anti-amyloid activity.
[EN] ACYL GUANIDINES AS BETA-SECRETASE INHIBITORS<br/>[FR] ACYLGUANIDINES EN TANT QU'INHIBITEUR DE BETA-SECRETASE
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2007002214A2
公开(公告)日:2007-01-04
[EN] There is provided a series of substituted acyl guanidines of Formula (I) or a stereoisomer; or a pharmaceutically acceptable salt thereof, wherein R1, R2. R3, R4 and R5 as defined herein, their pharmaceutical compositions and methods of use. These compounds inhibit the processing of amyloid precursor protein (APP) by Beta-secretase and, more specifically, inhibit the production of ABeta-peptide. The present disclosure is directed to compounds useful in the treatment of neurological disorders related to Beta-amyloid production, such as Alzheimer's disease and other conditions affected by anti-amyloid activity. [FR] L'invention concerne une série de guanidines à substitution acyle représentées par la formule (I) ou un de leurs stéréoisomères ou un de leurs sels acceptables sur le plan pharmaceutique, dans laquelle R1, R2. R3, R4 et R5 correspondent à leur définition dans le descriptif, leurs compositions pharmaceutiques et méthodes d'utilisation. Ces composés inhibent l'effet exercé sur la protéine précurseur d'amyloïde (APP) par béta-sécrétase et, de façon plus spécifique, inhibent la production du Abéta-peptide. L'invention concerne des composés utiles pour le traitement de troubles neurologiques relatifs à la production des béta-amyloïdes, tels que la maladie d'Alzheimer ou d'autres états associés à l'activité anti-amyloïde.