Immobilized TiO<sub>2</sub> nanoparticles on carbon nanotubes: an efficient heterogeneous catalyst for the synthesis of chromeno[<i>b</i>]pyridine derivatives under ultrasonic irradiation
作者:Shahrzad Abdolmohammadi、Behrooz Mirza、Esmail Vessally
DOI:10.1039/c9ra09031b
日期:——
A new protocol for the synthesis of chromeno[b]pyridine derivatives is described via a three-component reaction of 4-aminocoumarin, aromatic aldehydes and malononitrile catalyzed by TiO2 nanoparticles immobilized on carbon nanotubes (TiO2-CNTs) as an efficient heterogeneous catalyst under ultrasonic irradiation in water. The sustainable and economic benefits of the protocol are the high yields of products
描述了通过4-氨基香豆素、芳香醛和丙二腈的三组分反应合成色烯[ b ]吡啶衍生物的新方案,该反应由固定在碳纳米管 (TiO 2 -CNT) 上的 TiO 2纳米粒子作为高效多相催化剂催化在水中超声波照射下。该方案的可持续和经济效益在于产品收率高、反应时间短、后处理程序简单以及使用无毒且可重复使用的催化剂。