M 38 Mass spectrometry of nitrogenous heterocycles. 1. Mass spectrometric evaluation of stability of tetrahydropyrazines annelated to five- and six-membered heterocycles [Electronic resource] / N. A. Klyuev, V. G. Baklykov, V. N. Charushin, O. N. Chupakhin // Chemistry of Heterocyclic Compounds. - 1989. - Vol. 25, № 4. - С. 444-450. - Bibliogr. : p. 450 (18 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): TETRAHYDROPYRAZINES -- DISSOCIATION REACTION Аннотация: Based on a study of electron impact mass spectra of a large number of tetrahydropyrazines, which are joined to five- and six-membered heterocyclic and carbocyclic residues, the trends which characterize the stability of these condensed systems are found. The proposed criteria can be used for evaluation of the chemical stability of these compounds, for example, their propensity toward the reverse dissociation reaction. \\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\1989, v.25, N 4, p. 444.pdf |