M. Takeshita et al., C-3-SYMMETRICALLY-CAPPED HOMOTRIOXACALIX[3]ARENE - A PREORGANIZED HOST MOLECULE FOR INCLUSION OF PRIMARY AMMONIUM-IONS, Tetrahedron letters, 36(19), 1995, pp. 3341-3344
C-3-Symmetrically-capped homotrioxacalix[3]arene 1 acts as a well-preo
rganized host molecule for the binding of primary ammonium ions as obs
erved by both dynamic NMR spectroscopy and mass spectrometry.