A method has been developed for the synthesis of 1-arylimidazoles lacking a substituent at position 2, featuring the preparation of 1-arylimidazole N-oxides stabilized as boron trifluoride derivatives, with subsequent reduction to the desired imidazoles. This method permits broad variation of the substituents in the aryl part of these molecules.
The catalytic deuterodechlorination of aryl/heteroaryl chlorides was developed with a palladium/unsymmetrical NHC system, and the precisely controlled introduction of deuterium into a variety of aryl/heteroaryl compounds was achieved with a high level of efficiency, selectivity, and deuteration degree. This method was also successfully applied to the transformation of bioactive agents even in a gram-scale
A Modified Procedure for the Synthesis of 1-Arylimidazoles
作者:Hongbin Zhang、Jingping Liu、Jingbo Chen、Jingfeng Zhao、Yuanhong Zhao、Liang Li
DOI:10.1055/s-2003-42444
日期:——
A convenient modified process for the synthesis of 1-aromatic substituted imidazoles is provided. The protocol generally affords better yields of the sterically hindered 1-arylimidazoles.
Piano-Stool Iron Complexes as Precatalysts for <i>gem</i>-Specific Dimerization of Terminal Alkynes
作者:Qiuming Liang、Kasumi Hayashi、Karolina Rabeda、Jose L. Jimenez-Santiago、Datong Song
DOI:10.1021/acs.organomet.0c00271
日期:2020.6.22
A series of piano-stool Fe–NHC complexes have been prepared and characterized. The NHC ligands used herein possess a benzyl and a mesityl wingtip groups and have different electronic structures within the NHC rings. The catalytic activities of these Fe complexes have been examined for the homodimerization of terminal alkynes.
The nickel‐catalyzed deoxygenative deuteration of aryl/heteroaryl sulfamates has been developed, and the effective incorporation of deuterium into a variety of aromatic compounds was achieved with sufficient catalytic efficiency and high deuteration degree. This process tolerated reducible functional moieties and heterocyclic structures. Additionally, a double introduction of deuterium also successfully