Behavior of 5,6-dihydrobenzo[<i>h</i>]cinnolinones towards hydrazine. Synthesis of benzo[<i>h</i>]cinnolinones and of 4-Aminobenzo[<i>h</i>]cinnolinones
作者:Stefania Villa、Giacomo Luca Evoli、Giorgio Cignarella、Michela M. Curzu、Gérard A. Pinna
DOI:10.1002/jhet.5570360226
日期:1999.3
Dehydrogenation and amination of 4,4a,5,6-tetrahydro and 5,6-dihydrobenzocinnolinones in refluxing hydrazine hydrate to give new benzo[h]cinnolinones and 4-aminobenzo[h]cinnolinones are reported, and reaction mechanisms proposed. Experiments were also extended to 4,4a-dihydro-5H-indenopyridazinone which underwent hydrazine induced dehydrogenation to 5H-indenopyridazin-3-one but not subsequent amination.
据报道,在回流的水合肼中将4,4a,5,6-四氢和5,6-二氢苯并噻吩甲酮进行脱氢和胺化反应,得到新的苯并[ h ]邻苯二酚和4-氨基苯并[ h ]邻苯二酚,并提出了反应机理。实验还扩展到4,4a-二氢-5 H-茚并哒嗪酮,该肼经历肼诱导的脱氢成5 H-茚并哒嗪-3-酮,但随后没有胺化。