R. Saf et al., NEW DERIVATIVES OF 4,4,5,5-TETRAMETHYL-4,5-DIHYDRO-1H-IMIDAZOL-1-OXYL3-OXIDE AS MONOMERS FOR POLYRADICALS WITH SPECIAL MAGNETIC-PROPERTIES, Journal of heterocyclic chemistry, 30(2), 1993, pp. 425-428
The preparation of new derivatives of 4,4,5,5-tetramethyl-4,5-dihydro-
1H-imidazol-1-oxyl 3-oxide as monomers for purely organic polymers wit
h special magnetic properties is described. 3,5-Diethynylbenzaldehyde
and 3,5-bis(trimethylsilylethynyl)benzaldehyde were converted to the c
orresponding 1,3-dihydroxy-4,4,5,5-tetramethylimidazolidine derivative
s which were oxidized to stable nitronyl nitroxide radicals.