New membrane carrier for glutamic acid based on p-tert-butylcalix[4]arene 1,3-disubstituted at the lower rim

Calix[4]arenes 1,3-disubstituted at the lower rim were synthesized and their receptor ability toward dicarboxylic, α-hydroxy and amino acids was investigated. A new synthetic receptor for glutamic acid based on 1,3-disubstituted calix[4]arene was suggested.