Cp*Ir<sup>III</sup>
-Catalyzed [3+2] Annulations of <i>N</i>
-Aryl-2-aminopyrimidines with Sulfoxonium Ylides to Access 2-Alkyl Indoles Through C-H Bond Activation
A novel synthesis of 2‐alkyl indoles that uses N‐aryl‐2‐aminopyrimidines and sulfoxonium ylides was developed. It is an efficient and mild method for the synthesis of 2‐alkyl indoles. environmentally friendly solvents, efficient alternative carbenoid precursors, and novel catalyst system were used to complete this reaction. Many different directing groups can be used in this process, and the reaction
A General Strategy for the Nickel-Catalyzed C−H Alkylation of Anilines
作者:Zhixiong Ruan、Sebastian Lackner、Lutz Ackermann
DOI:10.1002/anie.201510743
日期:2016.2.24
The C−H alkylation of aniline derivatives with both primary and secondary alkyl halides was achieved with a versatile nickel catalyst of a vicinal diamine ligand. Step‐economic access to functionalized 2‐pyrimidyl anilines, key structural motifs in anticancer drugs, is thus provided. The C−H functionalization proceeded through facile C−H activation and SET‐type C−X bond cleavage with the assistance
Nickel-catalyzed alkyne annulation by anilines: versatile indole synthesis by C–H/N–H functionalization
作者:Weifeng Song、Lutz Ackermann
DOI:10.1039/c3cc43915a
日期:——
Versatile nickel catalysts enabled the step-economical synthesis of decorated indoles through alkyne annulations with anilines bearing removable directing groups. The CâH/NâH activation strategy efficiently occurred in the absence of any metal oxidants and with excellent selectivities.
Ruthenium(<scp>ii</scp>)-catalyzed intermolecular synthesis of 2-arylindolines through C–H activation/oxidative cyclization cascade
作者:Manash Kumar Manna、Samir Kumar Bhunia、Ranjan Jana
DOI:10.1039/c7cc03053c
日期:——
Herein, we report a ruthenium-catalyzed 1,2-carboamination through C–H activation for the synthesis of 2-arylindolines from readily available, inexpensive, protected anilines and vinyl arenes. In earlier reports, indoline synthesis through C–H activation was demonstrated using sterically or electronically biased olefins suppressing β-hydride elimination. However, in the present protocol a ruthenium(II)-catalyzed
anilines is herein reported. The reaction tolerates a broad range of aniline derivatives and provides a convenient approach for accessing the corresponding para/meta-selective difluoroalkylated products. Mechanism studies demonstrated that the initial CAr–H and N–H cycloruthenation is the pivotal step in achieving remote C–H difluoroacetylation.
本文报道了钌催化的苯胺的对位和间-二氟烷基化的替代反应。该反应可耐受各种苯胺衍生物,并提供了一种方便的方法来获得相应的对/间选择性二氟烷基化产物。机理研究表明,最初的C Ar –H和N–H环钌化是实现远程C–H二氟乙酰化的关键步骤。