Main features of (1)
- The presence of eight binding sites, four nitrogens and four
oxygens alternate in a 24 members macrocyclic
structure.
- The four nitrogens are protected by two benzyl and two
p-toluen-sulphonyl groups, alternate to each other, whose
selective
deprotection allows a suitable building block for the synthesis
of more
sophisticated polycyclic receptors with new topological
arrangements of
binding sites.
- To our knowledge there are no reports in the very large
literature
of polyoxapolyazacoronands (Ref. 2) dealing with the
preparation and
the study of the complexation of receptors based on
(1).