R 30 Reactions of 3,6-bis(3,5-dimethyl-4-r-pyrazol-1-yl)-1,2,4,5-tetrazines with indole and 1,3,3-trimethyl-2-methyleneindoline [Text] / R. I. Ishmetova, N. K. Ignatenko, I. N. Ganebnuikh, S. G. Tolshchina, P. A. Slepukhin, G. L. Rusinov // Heterocycles. - 2011. - Vol. 83, № 6. - P1363-1370 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: It has been found that 3,6-bis(3,5-dimethyl-4-R-pyrazol-1-yl)-1,2,4,5-tetrazines react with indole and 1,3,3-trimethyl-2-methyleneindoline to give pyridazines as [4+2]cycloaddition products. 1,3,3-Trimethyl-2-methyleneindoline has been shown to act as C-nucleophile in the substitution of pyrazolyl group as well as in the reactions of tetrazine ring expansion in [1,2,4]triazolo[4,3-b][1,2,4,5]tetrazine derivatives |