Oxidant-Switchable Selective Synthesis of 2-Aminobenzimidazoles via C–H Amination/Acetoxylation of Guanidines
摘要:
The iodine(III) compound promoted CH amination and tandem CH amination/acetoxylation of guanidines are achieved for the first time to provide efficiently 2-aminobenzimidazoles and acetoxyl-substituted 2-aminobenzimidazoles, respectively. The amount and type of iodine(III) compounds control the selective syntheses of two types of 2-aminobenzimidazoles. This reaction shows good regioselectivity when unsymmetrical substrates are used.
Zn(OTf)2-catalyzed addition of amines to carbodiimides: efficient synthesis of guanidines and unpredicted formation of Zn–N amido species
作者:Dongzhen Li、Jie Guang、Wen-Xiong Zhang、Yang Wang、Zhenfeng Xi
DOI:10.1039/b923249b
日期:——
Zn(OTf)2 acts as an excellent catalyst precursor for addition of various amine NâH bonds to carbodiimides under an atmosphere of air, offering a convenient synthesis of substituted guanidines with high functional-group tolerance. A ZnâN amido species is shown to act as the active species.
Oxidant-Switchable Selective Synthesis of 2-Aminobenzimidazoles via C–H Amination/Acetoxylation of Guanidines
作者:Yue Chi、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1021/ol502815p
日期:2014.12.19
The iodine(III) compound promoted CH amination and tandem CH amination/acetoxylation of guanidines are achieved for the first time to provide efficiently 2-aminobenzimidazoles and acetoxyl-substituted 2-aminobenzimidazoles, respectively. The amount and type of iodine(III) compounds control the selective syntheses of two types of 2-aminobenzimidazoles. This reaction shows good regioselectivity when unsymmetrical substrates are used.
Isotropic and Oriented Copper Nanoparticles Supported on Graphene as Aniline Guanylation Catalysts
作者:Sana Frindy、Abdelkrim El Kadib、Mohamed Lahcini、Ana Primo、Hermenegildo García
DOI:10.1021/acscatal.6b00995
日期:2016.6.3
oriented Cu nanoplatelets (3–4 nm thickness and 20–40 nm lateral dimensions) having a strong interaction with G. This enhancement of the catalytic activity derives from the preferential facet orientation of Cu nanoplatelets and their strong grafting on G. These catalytic results show the potential that G offers as support for metal NPs for the development of highly active recoverable heterogeneous catalysts