作者:A. B. Sheremetev、N. V. Palysaeva、K. Yu. Suponitskii、M. I. Struchkova
DOI:10.1007/s11172-012-0017-6
日期:2012.1
Furazancarboxylic hydrazides can serve as nucleophiles to substitute for one dimethylpyrazole fragment in bis(3,5-dimethylpyrazol-1-yl)-s-tetrazine, giving the corresponding N′-[6-(3,5-dimethylpyrazol-1-yl)-s-tetrazin-3-yl]-4-R-furazan-3-carbohydrazides in good yields. Dehydration of the indicated carbohydrazides in polyphosphoric acid for the first time gave rise to [1,2,4]triazolo[4,3-b]-s-tetrazines containing the furazan ring as a substituent at the triazole ring.
呋喃甲酰肼可以作为亲核物,替代双(3,5-二甲基吡唑-1-基)-s-四嗪中的一个二甲基吡唑片段,从而得到相应的 N′-[6-(3,5-二甲基吡唑-1-基)-s-四嗪-3-基]-4-R-呋喃-3-肼,产量很高。将上述羧肼在多磷酸中脱水后,首次生成了[1,2,4]三唑并[4,3-b]-s-四嗪,其中含有作为三唑环上取代基的呋喃环。