Direct C–H alkylation and indole formation of anilines with diazo compounds under rhodium catalysis
作者:Neeraj Kumar Mishra、Miji Choi、Hyeim Jo、Yongguk Oh、Satyasheel Sharma、Sang Hoon Han、Taejoo Jeong、Sangil Han、Seok-Yong Lee、In Su Kim
DOI:10.1039/c5cc07767b
日期:——
The rhodium(III)-catalyzed direct functionalization of aniline C-H bonds with [small alpha]-diazo compounds is described. These transformations provide the facile construction of ortho-alkylated anilines with diazo malonates or highly substituted indoles with...
Synthesis of cyclic guanidines: 2-arylamino-1,4,5,6-tetrahydropyrimidines
作者:Julian W. Shaw、David H. Grayson、Isabel Rozas
DOI:10.3998/ark.5550190.p008.222
日期:——
Considering the biological and chemical relevance of guanidine containing derivatives, we have devised a novel and efficient two-step synthesis of 2-arylamino-1,4,5,6-tetrahydropyrimidines. We have found that the coupling of aryl bromides with 2-aminopyrimidine is a very effective method for the high yielding synthesis of 2-arylaminopyrimidines. Moreover, the employment of Pd-catalysed hydrogenation
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
Bimetallic Nickel Complexes for Aniline C–H Alkylations
作者:Debasish Ghorai、Lars H. Finger、Giuseppe Zanoni、Lutz Ackermann
DOI:10.1021/acscatal.8b03770
日期:2018.12.7
A set of bimetallic nickel(II)/nickel(II) complexes featuring paddle-wheel structures was synthesized and fully characterized. These homobimetallic nickelcomplexes were identified as powerful catalysts for challenging aniline C–H activations with primary and secondary β-hydrogen-containing alkyl halides.