A simple and direct protocol is reported for the synthesis of the first non-symmetrically substituted 1,3-alternate conformers of calixarenes by selective mono-deacylation of a tribenzoyl precursor under basic conditions, followed by dialkylation.
A Fast Access to Non-Symmetrically Substituted 1,3-Alternate Conformers of Calixarenes
Eur. J. Org. Chem. 2004, 2848-2852.