Chemical behavior of 4,
<scp>9‐dimethoxy‐5‐oxo‐5</scp>
<i>H</i>
‐furo[3,2‐
<i>g</i>
]chromene‐6‐carboxaldehyde towards carbon nucleophilic reagents
作者:Magdy A. Ibrahim、Nasser M. El‐Gohary
DOI:10.1002/jhet.3991
日期:2020.7
4‐dihydro‐3H ‐pyrazol‐3‐one proceeds in 1:2 M ratio producing pyrazolo [4′,3′:5,6]pyrano[2,3‐c ]pyrazole derivative 22 . Carboxaldehyde 1 reacted with certain heterocyclic compounds containing active methylene groups to give the corresponding condensation products 22 ‐27 . The synthesized compounds were screened in vitro for their antimicrobial activity and showed high to moderate activities against the tested
研究了6-甲酰基khellin(1)对多种碳亲核试剂的化学行为。用氰基乙酰胺处理醛1,N-苄基氰基乙酰胺生成吡啶3-羧酰胺3和4。用丙二腈二聚体和1 H-苯并咪唑-2-基乙腈处理甲醛1分别得到1,6-萘并吡啶5和吡啶并[1,2- a ]苯并咪唑6。一些新颖的吡唑并[3,4- b ]吡啶7,吡啶并[2,3- d ]嘧啶8和9由羧醛1与某些杂环烯胺的开环闭环反应合成。另外,羧醛1与某些环状烯醇的反应产生了多种产物。用1,3-环己二酮处理甲醛1可以得到an吨-1,8-二酮19和20。甲醛1与5-甲基-2,4-二氢-3 H-吡唑-3-酮的反应以1:2 M的比例进行,生成吡唑并[4',3':5,6]吡喃并[2,3- c ]吡唑衍生物22。甲醛1与含有活性亚甲基,得到相应的缩合产物某些杂环化合物反应22 - 27。体外筛选了合成的化合物的抗微生物活性,并显示了对测试微生物的高至中等活性。