Catalytic C(sp
<sup>3</sup>
)−H Arylation of Free Primary Amines with an
<i>exo</i>
Directing Group Generated In Situ
作者:Yan Xu、Michael C. Young、Chengpeng Wang、David M. Magness、Guangbin Dong
DOI:10.1002/anie.201604268
日期:2016.7.25
Herein, we report the palladium‐catalyzeddirectarylation of unactivated aliphatic C−H bonds in free primary amines. This method takes advantage of an exo‐imine‐type directing group (DG) that can be generated and removed in situ. A range of unprotected aliphatic amines are suitable substrates, undergoing site‐selective arylation at the γ‐position. Methyl as well as cyclic and acyclic methylene groups
Diverse Tandem Cyclization Reactions of <i>o</i>-Cyanoanilines and Diaryliodonium Salts with Copper Catalyst for the Construction of Quinazolinimine and Acridine Scaffolds
Two cyclization modes are realized to produce different nitrogen-containing heterocycles, i.e., quinazolin-4(3H)-imines and acridines by assembling o-cyanoanilines and diaryliodonium salts via tandem reaction pathways.
A novel copper-catalyzedtandem C–S/C–C bond-forming reaction of 2-biaryl isothiocyanates with diaryliodonium salts was developed. This is the first general approach to synthesize phenanthridines from 2-biaryl isothiocyanates. This methodology has been successfully applied to the synthesis of trisphaeridine.
Palladacycle-Catalyzed Regioselective Heck Reaction Using Diaryliodonium Triflates and Aryl Iodides
作者:Lu Lei、Pei-Sen Zou、Zhi-Xin Wang、Cui Liang、Cheng Hou、Dong-Liang Mo
DOI:10.1021/acs.orglett.1c04120
日期:2022.1.21
P-containing palladacycle-catalyzed regioselective Heck reaction of 2,3-dihydrofuran with diaryliodonium salts and aryl iodides to afford 2-aryl-2,5-dihydrofurans and 2-aryl-2,3-dihydrofurans, respectively, in good yields. Mechanistic studies revealed that the oxidative addition of diaryliodonium salts to palladacycles to form Pd(IV) species showed high chemoselectivity and that electron-rich aryl moieties
Palladium(<scp>ii</scp>)-catalyzed stereoselective synthesis of <i>C</i>-glycosides from glycals with diaryliodonium salts
作者:Kumar Bhaskar Pal、Jiande Lee、Mrinmoy Das、Xue-Wei Liu
DOI:10.1039/d0ob00247j
日期:——
An efficient palladium(II) mediated C-glycosylation of glycals with diaryliodoniumsalts is described, providing a new strategy for the synthesis of 2,3-dideoxy C-aryl glycosides with excellent stereoselectivity. The C-glycosylation of a diverse range of glycals, including D-glucal, D-galactal, D-allal, L-rhamnal, L-fucal, L-arabinal, D-maltal, and D-lactal, occurred effectively and the corresponding