Calixarenes

This is the original proposed structure by Zinke and Ziegler in Chemische Berichte 77, 264 (1944).

calixarene formula


In 1994, a special issue about the 50th anniversary of the proposal of the macrocyclic structure of calixarenes was published in:
Journal of Inclusion Phenomena and Molecular Recognition in Chemistry, 19, 1994.

In this issue there can be found the review "The Early History of Calixarene Chemistry" by Th. Kappe on pages 3-15.