G. Alhakimi et E. Klemm, NOVEL POLYESTER BY INVERSE ELECTRON DEMAND DIELS-ALDER POLYADDITION OF BISPYRONE WITH DIVINYL ETHER, Polymer bulletin, 33(2), 1994, pp. 183-186
The inverse Diels-Alder reaction of bispyrone 4 with divinyl ether 5 l
eads to the polymer 6, with the number-average molecular weight M(n) =
4000 (gel permeation chromatography). The chemical structure of the p
olymer is determined by H-1 NMR spectroscopy and model reaction. Moreo
ver, the stereochemistry of the model compound was investigated by mea
ns of 2D COSY spectroscopy.