The acidity of calix[5]arenes and their linear analogues

Article abstract of DOI:10.1016/S0040-4020(99)00396-8

Five new calix[5]arenes containing a single p-nitrophenol unit as the most acidic phenolic unit have been synthesised by (3+2) fragment condensation of a trimer with a p-nitrophenol in the middle with various bishydroxymethylated alkanediyl diphenols. The