ABSTRACT
A series of 1,2-dimethyl-3-arylsulfonyl1-4,5-dihydroimidazolium iodides (7–11) was prepared by convenient sulfonylation and methylation from commercially available 2-methyl-2-imidazoline. Trisubstituted ethylenediamine derivatives 12–21 were synthesized from the reduction or hydrolysis of imidazolium salts 7–11 in high yield.
ACKNOWLEDGMENTS
This work was supported by the National Nature Science Foundation of China, and the Natural Science Foundation of Shanxi Province, China. The authors would like to thank Professor Nick R. Natale, at the University of Idaho, for his helpful suggestions.