制备了芳hydr并使其与吡唑基亚甲基丙二腈衍生物反应,生成在C-5处被吡唑衍生物取代的2,5-二氢哒嗪。通过在邻位使用含有氰基的氮杂胺,可以形成缩合的哒嗪并[1,6- a ]喹唑啉衍生物。合成的哒嗪的后续乙酰化导致嘧啶[4,5– c ]哒嗪化合物的形成,可以将其视为4-脱氮杂黄酮衍生物。所有新化合物均通过不同的光谱工具进行了全面表征,并使用2D-HMBC光谱对2,5-二氢哒嗪进行了结构明确的鉴定
Multicomponent synthesis of pyridazine and pyridazinoquinazoline derivatives in the presence of catalysts such as magnesium oxide (MgO) and 12-tungstophosphoric acid (PW)
作者:Hassan Sheibani、Zeinab Esfandiarpoor
DOI:10.1002/jhet.355
日期:2011.9
series of 3‐amino‐2,5‐dihydropyridazines and fused pyridazinoquinazolines have been prepared in a one‐step procedure from three‐component reactions of (arylhydrazono)‐propan‐2‐ones, aldehydes and malononitrile or ethyl cyanoacetate in the presence of magnesiumoxide (MgO) and 12‐tungstophosphoric acid (PW) as highly effective heterogeneous catalysts. The salient features of these methods include high
Synthesis of Novel Spiro Cyclic 2-Oxindole Derivatives of 6-Amino-4H-Pyridazine via [3+3] Atom Combination Utilizing Chitosan as a Catalyst
作者:Ismail Abdelhamid
DOI:10.1055/s-0028-1087558
日期:2009.3
Azaenamines were reacted with 3-cyanomethylidene-2-oxindoles using chitosan catalyst to yield spirocyclic 2-oxindole derivatives of 6-amino-4H-pyridazine and fused pyridazinoquinazolines.