New nano-Fe<sub>3</sub>O<sub>4</sub>-supported Lewis acidic ionic liquid as a highly effective and recyclable catalyst for the preparation of benzoxanthenes and pyrroles under solvent-free sonication
magnetic nanomaterial-immobilized Lewisacidic ionic liquid was successfully synthesized by the covalent embedding of 3-(3-(trimethoxysilyl)propyl)-1H-imidazol-3-ium chlorozincate (II) ionic liquid to the surface of Fe3O4 nanoparticles. The material was then characterized by FT-IR, SEM, TEM, TGA, ICP-OES, Raman, and EDS. Its performance as a new-generation Lewisacidic catalyst was also examined on the
将3-(3-(三甲氧基甲硅烷基)丙基)-1 H-咪唑-3-氯锌酸盐( II )离子液体共价嵌入Fe 3 O表面,成功合成了一种新型磁性纳米材料固定化Lewis酸性离子液体4纳米粒子。然后通过 FT-IR、SEM、TEM、TGA、ICP-OES、拉曼和 EDS 对材料进行表征。其作为新一代路易斯酸性催化剂的性能也在超声介导的苯并氧杂蒽和吡咯合成中进行了检验。完成后,通过外部磁铁简单地回收催化剂以进行多次重复使用,而不会显着降低催化性能。
Efficient One-Pot Condensation of <font>β</font>-Naphthol, Aldehydes, and Cyclic 1,3-Dicarbonyl Compounds Catalyzed by <i>p</i>-TSA Under Solvent-Free and Sonication Conditions
作者:Jianjun Li、Jia Li、Jin Fang、Weike Su
DOI:10.1080/00397910903029966
日期:2010.3.12
A facile and efficient procedure has been developed by one-pot condensation of β-naphthol, aldehydes, and cyclic 1,3-dicarbonyl compounds for the synthesis of 8,9,10,12-tetrahydrobenzo[a]xanthen-11-one or 8,9-dihydrobenzo-[f]cyclopenta[b]chromen-10(11H)-one derivatives catalyzed by p-toluenesulfonic acid undersolvent-free and sonication conditions.
Synthesis and characterization of a novel Brönsted acidic dicationic ionic liquid based on piperazine and its application in the one-pot synthesis of various xanthenes under solvent-free conditions
作者:Zainab Ehsani-Nasab、Ali Ezabadi
DOI:10.1007/s11164-022-04666-0
日期:2022.3
In this paper, an interesting Brönstedacidic dicationic ionicliquid based on piperazine was prepared via two-step synthesis. The structure of the dicationic ionicliquid (DIL) was confirmed with various techniques including Fourier transform infrared spectroscopy (FT-IR), Proton NMR (1H NMR), Carbon-13 NMR (13C NMR), mass spectroscopy (MS), acid–base titration as well as Hammett acidity function
在本文中,通过两步合成制备了一种有趣的基于哌嗪的 Brönsted 酸性双阳离子离子液体。双阳离子离子液体 (DIL) 的结构通过多种技术确认,包括傅里叶变换红外光谱 (FT-IR)、质子 NMR ( 1 H NMR)、Carbon-13 NMR ( 13 C NMR)、质谱 (MS)、酸碱滴定和哈米特酸度函数。在呫吨合成中检测了这种新型布朗斯台德酸性 DIL 的催化活性。产品收率高、反应时间短、催化剂易于回收和再利用以及不使用有机溶剂是开发过程的一些优点。
Supramolecular β-Cyclodextrin as a Reusable Catalyst for Xanthene Synthesis in Aqueous Medium
作者:Farzaneh Mohamadpour
DOI:10.1080/00304948.2022.2141047
日期:2023.7.4
Published in Organic Preparations and Procedures International: The New Journal for Organic Synthesis (Vol. 55, No. 4, 2023)