E. Klemm et al., HIGH-MOLECULAR-WEIGHT SOLUBLE POLYMERS WI TH CORONAND STRUCTURE SYNTHESIS AND PROPERTIES, Die Angewandte makromolekulare Chemie, 223, 1994, pp. 193-201
New polymers with an alternating sequence of aliphatic chains and coro
nands were synthesized via Diels-Alder addition polymerization of bis(
2-pyrones) with bismaleimides. The chemical structures of these polyme
rs 6 are supported by NMR spectra, model reactions and crystal X-ray s
tructure analysis. The tetra-functional maleimide 5 was synthesized an
d the cyclization of 5 to the bicycle 9 with 2 mol monopyrone 8 was ca
rried out.