An Efficient New Route for the Synthesis of Some 3-Hterocyclylquinolinones <i>via</i>
Novel 3-(1,2-Dihydro-4-hydroxy-1-methyl-2-oxoquinolin-3-yl)-3-oxopropanal and Their Antioxidant Screening
作者:Mohamed M. Hassan、Hany M. Hassanin
DOI:10.1002/jhet.2952
日期:2017.11
3‐(4‐hydroxy‐1‐methylquinoline‐3‐yl)‐3‐oxoproponal (5) was synthesized from 3‐[(E)‐3‐(dimethylamino)‐2‐propenoyl]‐4‐hydroxy‐1‐methyl‐2(1H)‐quinolinone (3) and was utilized as a starting precursor material. A convenient new route to functionalized 3‐heterocyclyl 4‐hydroxy‐2(1H)‐quinolinones such as pyrazolyl, isoxazolyl, pyrimidinyl, azepineyl, pyridonyl, and pyranyl heterocycles was described via cyclization
3-(4-羟基-1-甲基喹啉-3-基)-3-氧代丙醛(5)由3-[((E)-3-(二甲基氨基)-2-丙烯酰基] -4-羟基-1-甲基)合成-2(1 H)-喹啉酮(3)用作起始前体材料。官能化3-杂环基-4-羟基- 2(1一种方便新路线ħ)-quinolinones如吡唑基,异恶唑基,嘧啶基,azepineyl ,吡啶酮和吡喃基的杂环经由化合物环化描述5与一些Ñ和Ç -nucleophiles。新合成的醛5显示使用化合物与最大产率只有一个环闭合可能性,而不是3表现出不同的区域选择性闭环途径,且收率最低。根据相关光谱数据和元素微量分析,对所有新合成的产物进行了结构阐明。在一系列体外测试中筛选了产品的抗氧化活性。