A 10 A novel approach to fused 1,2,4-triazines by intramolecular cyclization of 1,2-diaza-1,3-butadienes bearing allyl(propargyl)sulfanyl and cyclic tert-amino groups [Text] / N. P. Belskaia, T. G. Deryabina, A. V. Koksharov, M. I. Kodess, A. T. Lebedev, V. A. Bakulev // Tetrahedron Letters. - 2007. - Vol. 48, № 52. - P9128-9131 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: 3-Allyl- and 3-prop-1-ynylsulfanyl-2-arylazo-3-cycloalkylamino-acrylonitriles undergo cyclization under mild conditions to afford the novel heterocyclic systems 1,4,6,7,8,8a-hexahydropyrrolo[2,1-c][1,2,4]-triazine-4-thione, 1,4,6,7,9,9a-hexahydro-[1,4]oxazino[3,4-c][1,2,4]triazine and 1,6,7,8,9,9a-hexahydro-4H-pyrido[2,1-c][1,2,4]triazine via a number of consecutive pericyclic reactions \\\\Expert2\\nbo\\Tetrahedron Letters\\2007, v. 48, p.9128.pdf |