Heterocyclic synthesis<i>via</i>enaminones: Novel synthesis of (1<i>H</i>)-pyridin-2-one, pyrazolo[1,5-<i>a</i>]pyrimidine and isoxazole derivatives incorporating a<i>N</i>-methylphthalimide and their biological evaluation
作者:Fatima Al-Omran、Adel A. El-Khair
DOI:10.1002/jhet.5570420222
日期:2005.3
Novel synthesis of (1H)-pyridin-2-one, pyrazolo[1,5-a]pyrimidine and isoxazole derivatives incorporating N-methylphthalimide moiety are reported. Reaction of enaminone 2 with malononitrile affords 4. Condensation of 2 with cyanothioacetamide or benzoylacetonitrile affords compounds 6 and 7 respectively. Reaction of 2 with hydrazine hydrate afford 2,3-dihydrophthalazine-1,4-dione (10). Condensation
报道了新的(1 H)-吡啶-2-酮,吡唑并[1,5- a ]嘧啶和结合有N-甲基邻苯二甲酰亚胺部分的异恶唑衍生物的合成。烯胺酮的反应2与丙二腈,得到4.缩合2与氰基硫代或苯甲酰乙腈,得到的化合物6和7分别。2与水合肼的反应得到2,3-二氢邻苯二甲酰-1,4-二酮(10)。2与羟胺和3-氨基吡唑衍生物的缩合得到化合物12和15a,b分别。测定了代表性化合物的抗微生物和抗真菌活性,其中大多数显示出适度的抗微生物活性,而化合物2和7对黑曲霉具有很强的活性。通过元素分析和1 H nmr光谱阐明了新合成化合物的结构,并通过13 C nmr研究阐明了某些情况。