Synthesis and single-crystal X-ray diffraction analysis of new heterocyclic coloured materials. 3-Arylazo-8H-imidazo[1,2-b] pyrazolo[4,3-d]pyridazines
作者:Thoraya A. Farghaly、Ahmad Sami Shawali
DOI:10.1016/j.tet.2010.02.012
日期:2010.4
A simple synthetic strategy is described for the hitherto unreported 3-arylazo-8H-imidazo[1,2-b]pyrazolo[4,3-d]pyridazines 7 is described based on the reaction of 3-acetyl-4-cyano-1,5-diphenylpyrazole hydrazone 3 with the hydrazonoyl halides 1a–l. The structures of such dyes were confirmed by spectroscopic and X-ray crystallographic analyses. The mechanism of formation of such compounds was also discussed
描述了一种简单的合成策略,该方法基于3-乙酰基-4-氰基-基团的反应,描述了迄今未报道的3-芳基偶氮-8 H-咪唑并[ 1,2- b ]吡唑并[4,3- d ]哒嗪7 1,5-二苯基吡唑3与hydr酰卤1a - 1。这种染料的结构通过光谱和X射线晶体学分析证实。还讨论了此类化合物的形成机理。