Hetero-annulated coumarins as new AChE/BuChE inhibitors: synthesis and biological evaluation
作者:Seyed Esmaeil Sadat Ebrahimi、Pegah Ghadirian、Hamideh Emtiazi、Azadeh Yahya-Meymandi、Mina Saeedi、Mohammad Mahdavi、Hamid Nadri、Alireza Moradi、Bilqees Sameem、Mohsen Vosooghi、Saeed Emami、Alireza Foroumadi、Abbas Shafiee
DOI:10.1007/s00044-016-1626-7
日期:2016.9
A series of chromene-fused coumarins known as 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-diones 4a–o were synthesized through one-pot reaction of appropriate benzaldehydes, dimedone, and 4-hydroxycoumarin in the presence of nano-silica sulfuric acid under solvent-free condition in good yields. The in vitro anticholinesterase assay revealed that the 3-hydroxyphenyl analog 4e showed the highest
通过适当的苯甲醛,二甲酮的一锅反应,合成了一系列称为10,11-dihydrochromeno [4,3- b ] chromene -6,8(7 H,9 H)-diones 4a-o的色烯稠合香豆素。在无溶剂条件下,在纳米二氧化硅硫酸存在下和4-羟基香豆素的收率很高。体外抗胆碱酯酶测定显示3-羟苯基类似物4e对乙酰胆碱酯酶和丁酰胆碱酯酶均显示出最高的抑制活性,具有IC 50值分别为3.28和2.19 µM。结构-活性关系研究表明,通过在3-羟基苯基侧基的对位引入第二个羟基或甲氧基取代基可以调节乙酰胆碱酯酶对丁酰胆碱酯酶的选择性。化合物4e与乙酰胆碱酯酶的对接研究证实了香豆素部分与Trp279之间的π - π堆积相互作用以及羟基与Asn85之间的氢键形成。