Detrifluoroacetylation Reaction of Trifluoromethyl-β-diketones: Facile Method for the Synthesis of Succinimide Derivatives and 1,4-Diketones
作者:Li-Hua Wang、Jing Zhao
DOI:10.1002/ejoc.201800680
日期:2018.8.23
A detrifluoroacetylation of trifluoromethyl‐β‐diketones has been developed, which allows for the synthesis of succinimides and 1,4‐diketones through cascade Michael addition/retro‐Claisen reaction and nucleophilic substitution/retro‐Claisen reaction.
The present invention provides an azolylacylquanidine compound of formula I
The present invention also provides methods for the use thereof to inhibit β-secretase (BACE) and treat β-amyloid deposits and neurofibrillary tangles.
The present invention provides an azolylacylquanidine compound of formula I
The present invention also provides methods for the use thereof to inhibit β-secretase (BACE) and treat β-amyloid deposits and neurofibrillary tangles.
Palladium-catalyzed coupling of amides and cyclopropanols for the synthesis of γ-diketones
作者:Lili Fang、Shuqi Jia、Shuaixin Fan、Jin Zhu
DOI:10.1039/d3cc02888g
日期:——
method has been developed for the coupling of amides and cyclopropanols to γ-diketones, through simultaneous C–N and C–C activation. Heteroatom ligand exchange and heteroatom-to-carbon ligation mode switching enable the achievement of molecular cross-coupling in an amide N-atom structural context-dependent manner, avoiding any stoichiometric organometallic reagent or base.
Acylguanidine inhibitors of β-secretase: Optimization of the pyrrole ring substituents extending into the S1 and S3 substrate binding pockets
作者:Derek C. Cole、Joseph R. Stock、Rajiv Chopra、Rebecca Cowling、John W. Ellingboe、Kristi Y. Fan、Boyd L. Harrison、Yun Hu、Steve Jacobsen、Lee D. Jennings、Guixian Jin、Peter A. Lohse、Michael S. Malamas、Eric S. Manas、William J. Moore、Mary-Margaret O’Donnell、Andrea M. Olland、Albert J. Robichaud、Kristine Svenson、JunJun Wu、Eric Wagner、Jonathan Bard
DOI:10.1016/j.bmcl.2007.12.010
日期:2008.2
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.