P. Bandyopadhyay et Pk. Bharadwaj, Synthesis of calix[4]arene-cryptand hybrid systems: A new generation of hosts for metal ions and molecules, SYNLETT, (12), 1998, pp. 1331-1332
A Cryptand with derivatizable secondary amino nitrogens has been successful
ly coupled to the lower rim of a calix[4]arene through different spacer uni
ts.