Sonogashira Cross-Coupling Reactions
and Construction of the Indole Ring System Using a Robust, Silica-Supported
Palladium Catalyst
作者:Elizabeth Tyrrell、Leon Whiteman、Neil Williams
DOI:10.1055/s-0028-1083375
日期:——
The use of a recyclable silica-supported palladium catalyst in Sonogashira couplings and indole syntheses using a range of functionalised substrates is described. The catalyst is shown to be both robust and versatile, effecting the synthesis of 2-phenylindole in quantitative yield without the need for N-protection, a copper cocatalyst, a base, or a solvent.
Pd/β-cyclodextrin-catalyzed C–H functionalization in water: a greener approach to regioselective arylation of (NH)-indoles with aryl bromides
作者:Peng Xu、Xin Hong Duan
DOI:10.1039/d1nj03400f
日期:——
A greener and more practical strategy for the site-selective C–H arylation of (NH)-indoles via coupling of (hetero)aryl bromides was developed, in which β-cyclodextrin, acting as both a ligand for Na2PdCl4 and a host for indoles, enables the reactions to occur easily in water. The key advantage of this method is the ingenious merging of aqueous homogeneous catalysis and ligand mediation, leading to
开发了一种更环保、更实用的策略,用于通过(杂)芳基溴化物的偶联对 (NH)-吲哚进行位点选择性 C-H 芳基化,其中 β-环糊精作为 Na 2 PdCl 4的配体和吲哚的宿主,使反应在水中容易发生。这种方法的关键优势是水相均相催化和配体介导的巧妙融合,导致具有广泛底物范围和官能团耐受性的 C3-芳基吲哚的高度区域选择性形成。此外,区域选择性可以通过改变碱基的性质而从 C3 位切换到 C2 位,而无需使用 ArI 作为底物。
Novel-2-Heteroaryl Substituted Indoles 695
申请人:Arzel Erwan
公开号:US20100098631A1
公开(公告)日:2010-04-22
The present invention relates to novel 2-heteroaryl substituted indole derivatives, precursors thereof, and therapeutic uses of such compounds, having the structural formula (Ia) below: and to their pharmaceutically acceptable salt, compositions and methods of use. Furthermore, the invention relates to novel 2-heteroaryl substituted indole derivatives that are suitable for imaging amyloid deposits in living patients, their compositions, methods of use and processes to make such compounds. More specifically, the present invention relates to a method of imaging amyloid deposits in brain in vivo to allow antemortem diagnosis of Alzheimer's disease as well as measuring clinical efficacy of Alzheimer?s disease therapeutic agents.