Synthesis of [1,2,4]Triazolo[4″,3″:1′,6′]Pyrimido[4′,5′:3,4]Pyridazino[1,6-D] [1,2,4]Triazine; A Novel Tetracyclic System
作者:Ayla Hazrathoseyni、Seyed Mohammad Seyedi、Ali Shiri、Hossein Eshghi
DOI:10.3184/174751915x14241706062908
日期:2015.4
with hydrazine hydrate to obtain the new fused bicyclic 4-aryl-5-hydrazinyl-3-(1-hydrazonoethyl)-1-phenyl-1,4-dihydropyrimido[4,5-c]pyridazines via the Dimroth rearrangement is reported. Further cyclisation was achieved by the treatment of latter compounds with triethyl orthoformate to afford several derivatives of a novel tetracyclic fused system [1,2,4] triazolo[4″,3″:1′,6′]pyrimido[4′,5′:3,4]pyridazino[1
6-乙酰基-3-氨基-5-芳基-2-苯基-2,5-二氢哒嗪-4-甲腈与原甲酸三乙酯再与水合肼缩合反应得到新型稠合双环4-芳基-5-肼基-3-(1-hydrazonoethyl)-1-phenyl-1,4-dihydropyrimido[4,5-c] pyridazines 通过 Dimroth 重排被报道。通过用原甲酸三乙酯处理后面的化合物来实现进一步的环化,以提供新型四环稠合系统 [1,2,4] 三唑并 [4",3":1',6'] 嘧啶 [4',5] 的几种衍生物':3,4]哒嗪并[1,6-d][1,2,4]三嗪。