Abstract
Novel calix[4]arene Schiff bases bearing chiral substituents both on the upper and the lower rims have been developed. These chiral receptors exhibit good chiral recognition ability towards α-amino acid ester hydrochlorides (up to K D/ K L = 4.36, ΔΔG 0 = − 3.65 kJ mol −1) in CHCl 3. The molecular recognition abilities and enantioselectivities for guests are also discussed from a thermodynamic point of view.
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