<i>In Situ</i>
Preparation of Palladium Nanoparticles for C‐2 Selective Arylation of Indoles in Agro‐Waste Extract Based Mixed Solvents
作者:Yajun Sun、Rui Wang、Tianxiang Liu、Weiwei Jin、Bin Wang、Yonghong Zhang、Yu Xia、Chenjiang Liu
DOI:10.1002/ejoc.202100331
日期:2021.5.7
An in situ generation of palladiumnanoparticle catalyzed direct C−H arylation of indoles with iodoarenes for the synthesis of 2‐arylindoles in bio‐basedmixedsolvents is described.
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。
Palladium-catalyzed direct arylation of indoles with arylsulfonyl hydrazides
作者:Congrong Liu、Lianghui Ding、Guang Guo、Weiwei Liu、Fu-Lai Yang
DOI:10.1039/c5ob02569a
日期:——
A novel method to synthesise 2-arylindoles is demonstrated via directarylation of indoles with arylsulfonyl hydrazides. Under the optimized reaction conditions, the reaction well tolerates a wide variety of functional groups to afford structurally diverse 2-arylindoles in good to excellent yields at 70 °C.
High-Throughput Screening Protocol for the Coupling Reactions of Aryl Halides Using a Colorimetric Chemosensor for Halide Ions
作者:Min Sik Eom、Jieun Noh、Han-Sung Kim、Soyeon Yoo、Min Su Han、Sunwoo Lee
DOI:10.1021/acs.orglett.6b00300
日期:2016.4.15
efficiency as a tool for high-throughputscreening (HTS) of transition-metal-catalyzed coupling reactions was investigated. It showed a high selectivity for halide ions. When the PAR–2Hg2+ complex was used in the Suzuki coupling reaction and C–H activated coupling reaction with aryl bromides, the quantitative and qualitative conversions of aryl halides were obtained from the reaction mixture color change
In Situ Generation of PhI<sup>+</sup>
CF<sub>3</sub>
and Transition-Metal-Free Oxidative sp<sup>2</sup>
CH Trifluoromethylation
作者:Cong Xu、Jingxin Liu、Wenbo Ming、Yingjie Liu、Jun Liu、Mang Wang、Qun Liu
DOI:10.1002/chem.201301585
日期:2013.7.8
to tri us: The introduction of CF3 units into organic molecules is important and requires the development of convenient trifluoromethylating reagents. Here, PhI+CF3, an acyclic electrophilic “CF3+” species, is described, including its in situ generation from TMSCF3, PhI(OAc)2, and KF and its direct applications in sp2 CH trifluoromethylations under mild transition‐metal‐free conditions (see scheme)