作者:Fatemeh Babaei、Sakineh Asghari、Mahmoud Tajbakhsh
DOI:10.1007/s11164-019-03858-5
日期:2019.9
New amine modified nanozeolites were prepared and characterized using FT-IR, TGA, DTG, SEM, and TEM. Then the synthesized nanozeolites were employed as novel, recyclable and safe catalysts for the one-pot, three-component condensation of 4-hydroxycoumarin with aldehydes and malononitrile to produce new and known pyrano[2,3-c]chromenes as potent biologically active compounds. This novel method has many advantages, such as high product yield and a simple work-up procedure.
制备了新型胺修饰纳米沸石,并使用傅立叶变换红外光谱(FT-IR)、热重分析仪(TGA)、热重分析仪(DTG)、扫描电镜(SEM)和电子显微镜(TEM)对其进行了表征。然后,将合成的纳米沸石作为新型、可回收和安全的催化剂,用于 4- 羟基香豆素与醛类和丙二腈的一锅三组分缩合反应,生成新的和已知的吡喃并[2,3-c]苯并吡喃,这些化合物具有很强的生物活性。这种新方法有许多优点,如产品收率高、操作过程简单等。