K. Ito et al., Syntheses of chiral calixarene analog incorporating amino acid residues: Molecular recognition for a racemic ammonium ion by the macrocycles, CHEM LETT, (12), 1998, pp. 1221-1222
Chiral calixarene analog incorporating amino acid residues into macrocyclic
rings was prepared. The macrocycles form a chiral concave, which is induce
d by the chiral transmission from the amino acid to the phenol-formaldehyde
tetramer unit through the hydrogen bonds. Molecular recognition for a chir
al ammonium ion by the macrocycles was investigated.