Synthesis and alkali metal cation complexation ofN-aryl [3.2.2] cryptands

Two novel three-nitrogen cryptands withN-aryl substituents are prepared by cyclization of 1, 10-diaza-18-crown-6 with mixed anhydrides of 6-arylaza-3,9-dioxadecanedioic acid followed by borane reduction of the resultant bicyclic diamides. For the alkali metal cations, theN-phenyl [3.2.2] cryptand exhibits strongest complexation for Rb⁺ in picrate extractions.Presented at the Fourth International Symposium on Inclusion Phenomena and the Third International Symposium on Cyclodextrins, Lancaster, U.K., 20–25 July 1986.