Stepwise synthesis and structural characterization of calix[4]- and calix[5]arenes bearing a functionalized arm on the methylene bridge

Article abstract of DOI:10.1016/S0040-4020(97)00827-2

Calix[4]arenes 4 and calix[5]arenes 6 functionalized at the methylene bridge are synthesized starting from benzaldehydes 1, diphenylmethanes 2 and formaldehyde or 2,6-dihydroxymethylphenols 5 respectively, ¹H NMR analyses of macrocycles 4 and 6 as well as crystal structure of the calix[5]arene 6by are reported.