A 53 An unexpected direction of the reaction of hydrazino-1,3,5-triazines with formic acid. Synthesis of (4H-1,2,4-triazol-3-yl)guanidines [Electronic resource] / V. V. Bakharev, V. E. Parfenov, I. V. Ul’yankina, A. V. Zavodskskaya, A. A. Gidaspov, P. A. Slepukhin // Chemistry of Heterocyclic Compounds. - 2015. - Vol. 51, № 11/12. - Bibliogr. : p. 1018 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): NITROGEN HETEROCYCLES -- 1,2,4-TRIAZOLYLGUANIDINES -- DIMROTH REARRANGEMENT Аннотация: A new direction of the reaction of 6-amino-substituted 4-hydrazino-1,3,5-triazin-2(1H)-ones with formic acid was found leading to the formation of N-substituted (4H-1,2,4-triazol-3-yl)guanidines together with the expected 5-amino-substituted 1,2,4-triazolo[1,5-a][1,3,5]-triazin-7-ones as a result of opening of the triazine ring and subsequent decarboxylation of an intermediate of the Dimroth rearrangement. The discovered reaction is of interest as a novel method for the synthesis of N-substituted (4H-1,2,4-triazol-3-yl)guanidines. \\\\expert2\\nbo\\Chemistry of Heterocyclic Compounds\\2015, v.51, N 11-12, p. 1014-1018.pdf |