Acylguanidine inhibitors of β-secretase: Optimization of the pyrrole ring substituents extending into the S1 and S3 substrate binding pockets
摘要:
Proteolytic cleavage of amyloid precursor protein by beta-secretase (BACE-1) and gamma-secretase leads to formation of beta-amyloid (A beta) a key component of amyloid plaques, which are considered the hallmark of Alzheimer's disease. Small molecule inhibitors of BACE-1 may reduce levels of A beta and thus have therapeutic potential for treating Alzheimer's disease. We recently reported the identification of a novel small molecule BACE-1 inhibitor N-[2-(2,5-diphenyl-pyrrol-1-yl)-acetyl]guanidine (3.a.1). We report here the initial hit-to-lead optimization of this hit and the SAR around the aryl groups occupying the S-1 and S-2' pockets leading to submicromolar BACE-1 inhibitors. (C) 2007 Elsevier Ltd. All rights reserved.
Development of a Palladium-Catalyzed Carbonylative Coupling Strategy to 1,4-Diketones
作者:Hongfei Yin、Dennis U. Nielsen、Mette K. Johansen、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/acscatal.6b00733
日期:2016.5.6
We report on a three-componentpalladium-catalyzed coupling strategy for accessing a wide range of 1,4-diketones, which represent important precursors to heterocycles. Our method relies on a carbonylative Heck reaction employing substituted allylic alcohols, aryl iodides, and carbon monoxide. The reaction conditions are mild and do not require high CO pressure, and a wide functional group tolerance