B. Konig et al., Synthesis and metal-ion extraction properties of para-tert-butylcalixareneglycine ester acetamides, EUR J INORG, (9), 1999, pp. 1557-1562
Calixareneglycine eater acetamides 4a-c have been synthesized from calixare
neacetyl chlorides 5a-c and glycine ethyl ester (6). Their ion-binding prop
erties have been investigated by liquid-liquid extraction with radiotracer
techniques. The experiments reveal a moderate affinity towards silver(I) io
ns, which increases with calixarene ring size.