The influence of the polymerization approach on the catalytic performance of novel porous poly (ionic liquid)s for green synthesis of pharmaceutical spiro-4-thiazolidinones
Although poly (ionicliquids) (PILs) have attracted great research interest owing to their various applications, the performance of nanoporous PILs has been rarely developed in the catalysis field. To this end, a micro–mesoporous PIL with acid–basebifunctional active sites was designed and fabricated by two different polymerization protocols including hydrothermal and classical precipitation polymerization
尽管聚(离子液体)(PILs)由于其各种应用而引起了极大的研究兴趣,但纳米多孔PILs的性能在催化领域却鲜有发展。为此,本文通过水热聚合和经典沉淀聚合两种不同的聚合方案设计和制造了一种具有酸碱双功能活性位点的微介孔 PIL。根据我们的观察,水热条件(高温和高压)使所提出的声催化剂具有大的多孔结构和高比表面积(S BET:315 m 2 g -1) 和通过加强交联的热稳定性(约 450 °C,重量损失 45%)。在一项比较研究中,选择了首选的纳米多孔 PIL,并将其用作靛红、伯胺和巯基乙酸的多组分反应中的声催化剂。在下文中,由于超声辐照之间的显着协同作用,在室温下合成了多种新的和已知的药物螺-4-噻唑烷酮衍生物,并在较短的反应时间(4-12 分钟)内获得了优异的产率(>90%)。和磁分离催化剂。
Ambient temperature synthesis of spiro[indoline-3,2′-thiazolidinones] by a DBSA-catalyzed sequential reaction in water
作者:Amreeta Preetam、Mahendra Nath
DOI:10.1016/j.tetlet.2016.02.079
日期:2016.3
An energy-efficient eco-friendly methodology for the synthesis of a series of pharmacologically important spiro[indoline-3,2′-thiazolidinones] has been developed by the reaction of primary amines with various isatin derivatives and thioglycolic acid in the presence of p-dodecylbenzenesulfonic acid (DBSA) as an efficient Brønsted acid surfactant combined catalyst in aqueous medium at 25 °C. This synthetic
The solvent-free, microwave (MW)-assisted synthesis of a new series of 3′-(aryl/heteroaryl)-1-morpholinomethyl/piperidinomethylspiro[3H-indole-3,2′-thiazolidine]-2,4′(1H)-diones has been achieved in an open vessel. Isatins undergo an easy condensation with various aryl/heteroaryl amines by MW using montmorillonite K10 clay as a solid support to afford Schiff bases , which subsequently undergo smooth