2,6,9-Trioxabicyclo[3.3.1]nona-3,7-dien-4-oyl and tetraoxaadamantan-9-oyl functionalized aromatic di- and triamines: synthesis, stereochemistry and complexation

Primary amino groups of di- or triaminoaryl compounds add a remarkably stable dioxinyl-alpha-oxoketene affording bis- or tris-[trioxabicyclo[3.3.1]nona-3,7-dienyl (bridged bisdioxine)] systems which can be converted into the corresponding bis- or tris-[2,4,6,8-tetraoxadamantanes] by acidic hydrolysis. Stereochemical peculiarities as well as preliminary host-guest abilities of these molecules are investigated with aid of NMR-spectroscopy, an X-ray analysis and ESI-mass spectrometry. (C) 2004 Elsevier Ltd. All rights reserved.