C. Geraci et al., CATION ENCAPSULATION WITHIN A 10-OXYGEN SPHEROIDAL CAVITY OF CONFORMATIONALLY PREORGANIZED 1,5-3,7-CALIX[8]BIS-CROWN-3 DERIVATIVES, Chemical communications, (10), 1997, pp. 921-922
Conformationally preorganized, D-2d-symmetrical 1,5-3,7-calix[8]bis-cr
own-3 derivatives have been synthesized which are able to encapsulate
cations with a size dependent selectivity.