G. Alhakimi et E. Klemm, SYNTHESIS OF A TETRA(MALEIMIDE) AS INTERMEDIATE COMPOUND IN A LINEAR DIELS-ALDER POLYADDITION OF BISMALEIMIDES WITH BIS(2-PYRONE)S, Journal of polymer science. Part A, Polymer chemistry, 33(5), 1995, pp. 767-770
The tetrafunctional products 3 and 6 were synthesized via Diels-Alder
reaction of bis(2-pyrone) with bismaleimides in mol ratio 1:7. The che
mical structure of these products was determined by H-1-NMR spectrosco
py; the high degree of purity was confirmed by means of elemental anal
ysis. The cyclization of the tetraimide 3 with 2 mol monopyrone 7 to t
he bicycle 8 was carried out. (C) 1995 John Wiley and Sons, Inc.