Abstract
The article describes the synthesis of Schiff base p-tert-butylcalix[4]arenes 3a-e in which the Schiff base unit bridges two opposite hydroxy groups of p-tert-butylcalix[4]arene (1). The synthesis of 3a-e have been achieved by refluxing p-tert-butylcalix[4] arene 1,3-dicarbaldehyde 2 with appropriate diamino compounds in acetonitrile-methanol. Yields range from 14 to 96%. The complexing properties of 3a-e toward alkali and alkaline earth cations, transition and heavy metals, and lanthanides are reported
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