Cyclization of (1,2,4,5-tetrazin-3-yl)hydrazones to 3,7-dihydro-1,2,4-triazolo[4,3-b]-1,2,4,5-tetrazines
作者:S. G. Tolshchina、A. G. Vyakhireva、N. K. Ignatenko、R. I. Ishmetova、I. N. Ganebnykh、P. A. Slepukhin、G. L. Rusinov
DOI:10.1007/s11172-009-0168-2
日期:2009.6
The intramolecular cyclization of (6-R-1,2,4,5-tetrazin-3-yl)hydrazones of ketones (R is 3,5-dimethylpyrazol-1-yl, 4-methylimidazol-1-yl, or 2-alkylidenehydrazino) giving rise to the previously unknown 3,7-dihydro-1,2,4-triazolo[4,3-b]-1,2,4,5-tetrazines, including spiro compounds, was studied. The reactivity and the yields of the reaction products depend on the structure of the alkylidene fragment and the nature of the substituent in the tetrazine ring.
酮的(6-R-1,2,4,5-四嗪-3-基)腙的分子内环化(R为3,5-二甲基吡唑-1-基、4-甲基咪唑-1-基或2-研究了亚烷基肼)产生以前未知的3,7-二氢-1,2,4-三唑并[4,3-b]-1,2,4,5-四嗪,包括螺化合物。反应产物的反应性和产率取决于亚烷基片段的结构和四嗪环中取代基的性质。