Recognition of Amides by New Rigid Calix[4]arene-Based Cavitands
作者:Arturo Arduini、Andrea Secchi、Andrea Pochini
DOI:10.1021/jo005596n
日期:2000.12.1
N-phenylureido group spaced by a methylene unit from the apolar cavity, binding constants up to 756 M(-)(1) were measured. Neither the two separate potential binding sites, nor the model host, where the calix[4]arene skeleton is flexible show detectable binding ability toward the series of guests examined. The rigidity of the calix[4]arene apolar cavity is the key control element in determining the efficiency