Cobalt-Catalyzed Direct C(sp<sup>2</sup>
)-H Alkylation with Unactivated Alkenes
作者:Ye Lim Kim、Sun-a Park、Ju Hyun Kim
DOI:10.1002/ejoc.202000565
日期:2020.7.15
An efficient Cp*CoIII‐catalyzed direct C(sp2)–H bond alkylation with unactivated alkenes was developed, affording mono‐diarylethane products with high linear selectivity. This reaction provided a simple, practical, and atom‐economical way to construct phenethyl groups on sp2 carbon. A wide range of arenes, styrenes, and alkyl arenes were well tolerated under mild reaction conditions and showed high
开发了一种有效的Cp * Co III催化的具有未活化烯烃的直接C(sp 2)-H键烷基化反应,从而提供具有高线性选择性的单二芳基乙烷产品。该反应为在sp 2碳上构建苯乙基提供了一种简单,实用且原子经济的方法。各种芳烃,苯乙烯和烷基芳烃在温和的反应条件下均具有良好的耐受性,并具有很高的官能团相容性。
Rh<sup>III</sup>-Catalyzed CH Activation with Pyridotriazoles: Direct Access to Fluorophores for Metal-Ion Detection
作者:Ju Hyun Kim、Tobias Gensch、Dongbing Zhao、Linda Stegemann、Cristian A. Strassert、Frank Glorius
DOI:10.1002/anie.201504757
日期:2015.9.7
The first CH bond activation with pyridotriazoles as coupling partners is presented using a RhIII catalyst. The pyridotriazoles can be used as new carbene precursors in CHactivation for directaccess to novel fluorescent scaffolds. These tunable fluorophores can be applied for the detection of metal ions.
Ruthenium-catalyzed C–H allylation of arenes with allylic amines
作者:Rui Yan、Zhong-Xia Wang
DOI:10.1039/c8ob00723c
日期:——
Ru-catalyzed pyridyl-directed C–H allylation of arenes with allylicamines has been developed. This reaction was carried out in the presence of 5 mol% of [Ru(p-cymene)Cl2]2 and 0.5 equiv. of AgOAc in CF3CH2OH at 75 °C, affording the allylated products of arenes in moderate to excellent yields. The method exhibits a wide scope of allylicamines and arenes and shows a good compatibility of functional groups
<scp>Cobalt‐Catalyzed</scp>
C—H Allylation of Arenes with Allylic Amines
作者:Rui Yan、Hang Yu、Zhong‐Xia Wang
DOI:10.1002/cjoc.202000680
日期:2021.5
catalyzes pyridyl‐directedC—H allylation of arenes with allylic amines in the presence of AgOAc and CF3COOAg. The reaction features ortho‐position monoallylation of 2‐pyridylarenes, giving the allylated arenes in moderate to high yields. A range of functional groups including OMe, Me, Ph, F, Cl, Br, CF3, C(O)Me, COOEt, and COOH groups are tolerated. Pyrimidyl‐directedC—H allylation of arenes were also performed
Cobalt(III)-Catalyzed Directed CH Coupling with Diazo Compounds: Straightforward Access towards Extended π-Systems
作者:Dongbing Zhao、Ju Hyun Kim、Linda Stegemann、Cristian A. Strassert、Frank Glorius
DOI:10.1002/anie.201411994
日期:2015.4.7
The first highlyefficient and scalable cobalt‐catalyzed directed CH functionalization with carbene precursors is presented. This methodology provides a modular route towards a new class of conjugated polycyclic hydrocarbons with tunable emission wavelengths both in solution and in the solid state.