Remote site-selective C–H activation directed by a catalytic bifunctional template
作者:Zhipeng Zhang、Keita Tanaka、Jin-Quan Yu
DOI:10.1038/nature21418
日期:2017.3
In chemical syntheses, the activation of carbon–hydrogen (C–H) bonds converts them directly into carbon–carbon or carbon–heteroatom bonds without requiring any prior functionalization. C–Hactivation can thus substantially reduce the number of steps involved in a synthesis. A single specific C–H bond in a substrate can be activated by using a ‘directing’ (usually a functional) group to obtain the desired
Transition Metal-Free Homocoupling of Unactivated Electron-Deficient Azaarenes
作者:Wen-Wen Xie、Yue Liu、Rui Yuan、Dan Zhao、Tian-Zhi Yu、Jian Zhang、Chao-Shan Da
DOI:10.1002/adsc.201500445
日期:2016.3.17
first direct homocoupling of unactivated electron‐deficient azaarenes in the presence of TMPMgCl (2,2,6,6‐tetramethylpiperidinylmagnesium chloride) and TMEDA (tetramethylethylenediamine). In this process, no transitionmetal was used while freely available air was employed as the oxidant. The investigated successful substrates included quinolines, isoquinoline, 3‐phenylated pyridines, and 2‐phenylated
<i>N</i>-Heterocyclic Carbene Coordinated Heterogeneous Pd Nanoparticles as Catalysts for Suzuki–Miyaura Coupling
作者:Hyemin Min、Hiroyuki Miyamura、Shū Kobayashi
DOI:10.1246/cl.160369
日期:2016.7.5
Palladium nanoparticle (Pd NP) catalysts immobilized in a polymer with an N-heterocycliccarbene (NHC) moiety (PICB-NHC-Pd) have been developed, wherein the NHC moiety plays dual roles as a crosslinker and a ligand to activate the Pd NPs. The presence of both Pd NPs and NHC was confirmed by STEM/EDS and SR-MAS NMR analyses, respectively. This PICB-NHC-Pd catalyst showed excellent activity in the Suzuki–Miyaura
Efficient Diphosphane-Based Catalyst for the Palladium-Catalyzed Suzuki Cross-Coupling Reaction of 3-Pyridylboronic Acids
作者:Xing-Li Fu、Lei-Lei Wu、Hai-Yan Fu、Hua Chen、Rui-Xiang Li
DOI:10.1002/ejoc.200900038
日期:2009.5
4′-bis(diphenylphosphanyl)-3,3′-bipyridine (P-Phos) has been developed for the Suzukicross-coupling reaction of pyridylboronic acid with a variety of aryl halides in good to excellent yields, even in the presence of hindered and functional groups. In addition, P-Phos also exhibited high activity in the palladium-catalyzedSuzuki reaction of 2,6-dimethoxypyridylboronic acid in excellent yields with a fast
[EN] PHENYL SUBSTITUTED PIPERIDINE COMPOUNDS FOR USE AS PPAR ACTIVATORS<br/>[FR] COMPOSES DE PIPERIDINE PHENYLE A SUBSTITUTION PHENYLE S'UTILISANT COMME ACTIVATEURS DE PPAR
申请人:PFIZER PROD INC
公开号:WO2004048334A1
公开(公告)日:2004-06-10
PPAR alpha activators, pharmaceutical compositions containing such compounds and the use of such compounds to elevate certain plasma lipid levels, including high density lipoprotein-cholesterol and to lower certain other plasma lipid levels, such as LDL-cholesterol and triglycerides and accordingly to treat diseases which are exacerbated by low levels of HDL cholesterol and/or high levels of LDL-cholesterol and triglycerides, such as atherosclerosis and cardiovascular diseases, in mammals, including humans.