25371-97-5Relevant articles and documents
Steric effects on acetate-assisted cyclometallation ofmeta-substitutedN-phenyl andN-benzyl imidazolium salts at [MCl2Cp*]2(M = Ir, Rh)
Davies, David L.,Singh, Kuldip,Tamosiunaite, Neringa
, p. 13505 - 13515 (2021/10/12)
meta-SubstitutedN-phenyl,N′-methyl andN-benzyl,N′-methyl imidazolium salts undergo acetate-assisted cyclometallation to provide mixtures oforthoandparasubstituted cyclometallated complexes. The effect of the substituents on the isomer ratios is discussed; steric effects are more important in the 6-membered rings derived from theN-benzyl imidazolium salts than 5-membered rings from theN-phenyl salts. Comparisons are made to steric effects with some other common directing groups.
Efficient and reusable catalytic system of Cul-PEG for n-arylation of imidazoles
Zhang, Qiang,Luo, Jun,Wei, Yunyang
experimental part, p. 114 - 121 (2011/11/01)
A simple, efficient, and recyclable catalytic system of CuI-poly(ethylene glycol) (PEG) was developed for the N-arylation of imidazoles with aryl halides to afford corresponding N-arylimidazoles in good to excellent yields under mild conditions and free of any additional ligands and solvents. The isolation of the products was readily performed by simple extraction with ether, and the catalytic system could be reused without remarkable loss of activity even after six runs.
Ninhydrin: an efficient ligand for the Cu-catalyzed N-arylation of nitrogen-containing heterocycles with aryl halides
Huang, Yi-Zheng,Gao, Jin,Ma, Hong,Miao, Hong,Xu, Jie
, p. 948 - 951 (2008/09/17)
Cu2O/ninhydrin was found to be an efficient catalyst system for the N-arylation of nitrogen-containing heterocycles with aryl and heteroaryl iodides, bromides and even unactivated chlorides to give the products in moderate to excellent yields.