A series of novel chiral imidazolium cyclophanes were synthesized from natural amino acids. (S)-2- (1-Imidazolyl)alkanoates(2) were prepared by cyclization and esterification. In the presence of DMAP and Et_ 3 N. Alkanoates(2) reacted with ethylenediamine to yield compounds 3 with satisfactory yields. Compounds 3 reacted with 2,6-bis(bromomethyl)- 4-chlorphenol, 1,3-bis(bromomethyl)benzene or 2,6-bis(bromomethyl)pyridine to afford dibromide salts under high dilution and anhydrous condition. Finally, the hex...
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