Facile synthesis of calix[5]arenes with three different upper rim substituents

Article abstract of DOI:10.1055/s-1996-4391

Four calix[5]arenes, which have three different substituents at the upper rim of calix, are synthesized by the '3 + 2' fragmentation condensation reaction. An equimolar mixture of p-substituted phenol trimer (BCB) and 2,2'-bishydroxymethyl p-substituted p