A Schiff base cryptand is synthesized in 65–75 and 20% yield, respectively, via one-step [2+3] condensation of a flexible dialdehyde with tris(2-aminoethyl)amine in the presence and absence of template; a polyoxa-aza cryptand is synthesized in 75% yield upon reduction of the Schiff base.
Z. Ma, R. Yang and L. Yan, J. Chem. Res. (S), 1999, 712 DOI: 10.1039/A904973H
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