摘要:
A simple route to introduce various heterocycles, derivatives of dipyridyls and indolizines on the lower rim of the para-tertbutylcalix[4] arene via ester bond formation to afford 1,3-disubstituted conjugates is described. The conformation of the new compounds and some intermolecular interactions are discussed on the basis of X-ray and NMR analyses. Preliminary complexation properties of some of the new tert-butylcalix[4] arene heterocyclic conjugates with Cu (II), Co (II) and Ni (II) were studied by means of UV-Vis titration.