Ligand-Free Copper-Catalyzed Arylation of Imidazole and<i>N,N</i>′-Carbonyldiimidazole, and Microwave-Assisted Synthesis of<i>N</i>-Aryl-1<i>H</i>-imidazoles
作者:Xiao-Dong Yang、Liang Li、Hong-Bin Zhang
DOI:10.1002/hlca.200890156
日期:2008.8
Microwave-assistedarylation of 1H-imidazoles and N,N′-carbonyldiimidazole under ligand-free copper-mediated conditions in tetraethyl orthosilicate is reported. Valuable evidence for understanding of the Cu-catalyzed mechanism of the Ullmann reaction is also presented.
Direct C–N Coupling of Imidazoles with Aromatic and Benzylic Compounds via Electrooxidative C–H Functionalization
作者:Tatsuya Morofuji、Akihiro Shimizu、Jun-ichi Yoshida
DOI:10.1021/ja501093m
日期:2014.3.26
A method for the C-N coupling of imidazoles based on electrooxidative C-H functionalization of aromatic and benzylic compounds has been developed. The key to the success is the formation of protected imidazolium ions as initial products, avoiding overoxidation. Deprotection under nonoxidative conditions affords N-substituted imidazoles. Various functional groups are compatible with the present transformation
Base‐catalyzed Effective C2‐Amidation of Azolium Salts Using Isocyanates under Mild Conditions
作者:Somnath Bauri、Arya Ramachandran、Arnab Rit
DOI:10.1002/asia.202201301
日期:——
An efficient base-catalyzed hydroarylation of isocyanates with azolium salts was developed, which provided facile access to a diverse family of C2-amidated azolium salts under mild conditions.