A highly efficient and recyclable Fe<sub>3</sub>O<sub>4</sub> magnetic nanoparticle immobilized palladium catalyst for the direct C-2 arylation of indoles with arylboronic acids
作者:Lei Zhang、Pinhua Li、Can Liu、Jin Yang、Min Wang、Lei Wang
DOI:10.1039/c4cy00040d
日期:——
A highly efficient Fe3O4 magnetic nanoparticle (MNP) immobilized palladiumcatalyst was prepared and applied to the direct C-2 arylation of indoles with arylboronic acids. The reactions generated the corresponding cross-coupling products in good yields. In addition, the supported catalyst with low loading (2.0 mol%) showed high stability and could be recovered and reused 8 times without significant
制备了高效的Fe 3 O 4磁性纳米粒子(MNP)固定的钯催化剂,并将其用于吲哚与芳基硼酸的直接C-2芳基化。反应以良好的产率产生了相应的交叉偶联产物。另外,低负载量(2.0mol%)的负载型催化剂显示出高稳定性,并且可以被回收和再利用8次而没有明显的活性损失。
Remarkably Effective Phosphanes Simply with a PPh<sub>2</sub>Moiety: Application to Pd-Catalysed Cross-Coupling Reactions for Tetra-<i>ortho</i>-substituted Biaryl Syntheses
作者:Chau Ming So、Wing Kin Chow、Pui Ying Choy、Chak Po Lau、Fuk Yee Kwong
DOI:10.1002/chem.201000723
日期:2010.7.19
Expanding the horizons of ArPPh2: New applications of triarylphosphane ligands are presented. The Pd–L1 and Pd–L2 complexes offer exceptionally high activity in Suzuki–Miyaura cross‐couplings of aryl chlorides. The extremely congested synthesis of tetra‐ortho‐substituted biaryl compounds is achieved for the first time by simply using triarylphosphane ligands.
Mild and selective base-free C–H arylation of heteroarenes: experiment and computation
作者:Hannes P. L. Gemoets、Indrek Kalvet、Alexander V. Nyuchev、Nico Erdmann、Volker Hessel、Franziska Schoenebeck、Timothy Noël
DOI:10.1039/c6sc02595a
日期:——
A mild and selective C–Harylation strategy for indoles, benzofurans and benzothiophenes is described. The arylation method engages aryldiazonium salts as arylating reagents in equimolar amounts. The protocol is operationally simple, base free, moisture tolerant and air tolerant. It utilizes low palladium loadings (0.5 to 2.0 mol% Pd), short reaction times, green solvents (EtOAc/2-MeTHF or MeOH) and