By five steps,two novel hydroxy imidazolium salts from(±)-2,2′-dimethyl-6,6′-dinitro-1,1′-biphenyl were prepared.The yield of imidazolium salts(from D to E)reached 86-89 %.The products were characterized by 1H NMR...
Reaction of anion(phenoxo)functionalized-NHC predecessor[HO-3,5-di-C(CH3)3-C6H2-2-CH2{CH(NCHCHN)CH(CH3)2}]Cl with N-BuLi in molar ratio 1∶2 at the room temperature gives the first N-heterocyclic carbenes(NHC)benzyl m...
Four novel hexadentate imidazolium salts were readily prepared by refluxing hexakis(bromomethyl)benzene with l-substituted imidazoles in THF in 90~96% yields.