S 73 Sosnovskikh, V. Ya. On the reaction of 3-cyanochromones with phenyl- and methylhydrazines: Structural revision and a simple synthesis of chromeno[4,3-c]pyrazol-4-ones [Text] / V. Ya. Sosnovskikh, V. S. Moshkin, M. I. Kodess // Journal of Heterocyclic Chemistry. - 2010. - Vol. 47, № 3. - P629-633 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Reactions of 3-cyanochromones with phenylhydrazine gave the corresponding 5-amino-4-salicyloyl-1-phenylpyrazoles, 2-aminochromone-3-carbaldehyde N-phenylhydrazones, and 1-phenylchromeno[4,3-c]pyrazol-4(1H)-one, depending on the reaction conditions. With methylhydrazine, 3-(2-hydroxyaryl)-1-methylpyrazole-4-carbonitriles and 2-methylchromeno[4,3-c]pyrazol-4(2H)-ones were obtained in moderate to high yields \\\\Cserver\\dist\\НБО\\Электронная библиотека_Библиогр1\\Journal of Heterocyclic Chemistry\\2010.v.47.p.629.pdf |