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Year 2007, Month 10 (Section Full Articles, Page 2043)

New type of spin-labeled aminoenal

E. V. Tretyakov, V. I. Ovcharenko, R. Z. Sagdeev, D. V. Stass, G. V. Romanenko, A. V. Mareev, and A. S. Medvedeva

Ethynyl-substituted nitronyl nitroxide is involved in the 1,3-dipolar cycloaddition with cyclic nitrones without affecting the nitronyl nitroxide fragment. The reaction of 2,4,4,5,5-pentamethyl-4,5-dihydro-1H-imidazole 3-oxide produces the corresponding 1,2,3,7a-tetrahydroimidazo[1,2-b]isoxazole derivative. The analog of the latter derived from 4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole 3-oxide is transformed into spin-labeled aminoenal. The solid phase of aminoenal is formed by packing unsymmetrical trimers resulting from the self-assembling of the molecular fragments based on a hydrogen bond network.

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