作者:Peter Dragovich、Julie Blazel、Kimkim Dao、David Ellis、Lian-Sheng Li、Douglas Murphy、Frank Ruebsam、Chinh Tran、Yuefen Zhou
DOI:10.1055/s-2008-1032157
日期:2008.2
The synthesis of a novel class of 6-amino-5-hydroxy-pyridazin-3(2 H)-ones (3-oxo-2,3-dihydropyridazines) is described. These compounds also contain an ethoxycarbonyl moiety at the 4-position of the pyridazinone ring. They are prepared in good to moderate yields (30-72%) by the condensation of disubstituted amines with (alkylhydrazono)- or (arylhydrazono)(chloro)acetates followed by subsequent acylation
描述了一类新型 6-amino-5-hydroxy-pyridazin-3(2 H)-ones (3-oxo-2,3-dihydropyridazines) 的合成。这些化合物还在哒嗪酮环的 4 位含有乙氧羰基部分。它们通过二取代胺与(烷基肼基)或(芳基肼基)(氯)乙酸酯的缩合,然后用乙基丙二酰氯和 Dieckmann 环化,以良好至中等的产率(30-72%)制备。描述了对新方法的范围和局限性的初步评估,以及哒嗪酮制剂中使用的几种(烷基肼基)(氯)乙酸酯底物的新合成。