Inherently Chiral Calixcrowns Derived from p-tert-Butyldihomooxacalix[4]arene

Abstract

The synthesis of the first calixcrowns derived from p-tert-butyldihomooxacalix[4]arene is reported. Both are, in solution at room temperature, in the cone conformation, which is shown by NMR studies. Their inherently chirality is also evident from ¹H NMR experiments.

Notes

To indicate the number of phenol unities that a molecule has, a bracket number is inserted between “calix” and “arene”, being the p-substituent designated by the name and wrote before

Chiral complexing agent, S (+)-1-(9-anthryl)-2,2, 2-trifluoroethanol.