Nano-zirconia as an excellent nano support for immobilization of sulfonic acid: a new, efficient and highly recyclable heterogeneous solid acid nanocatalyst for multicomponent reactions
作者:Ali Amoozadeh、Salman Rahmani、Mehrnoosh Bitaraf、Fatemeh Bolghan Abadi、Elham Tabrizian
DOI:10.1039/c5nj02430g
日期:——
Nano-zirconia-supported sulfonic acid as a novel, highly efficient and recyclable heterogeneous nanocatalyst is reported for the synthesis of multicomponent reactions.
报告了一种新型的、高效的、可回收的纳米催化剂——纳米氧化锆支撑的磺酸,用于合成多组分反应。
Facile and efficient protocols for C–C and C–N bond formation reactions using a superparamagnetic palladium complex as reusable catalyst
作者:Mohammad Ali Karimi Zarchi、Seyed Shahab Addin Darbandizadeh Mohammad Abadi
DOI:10.1007/s11164-019-03754-y
日期:2019.5
Abstract Facile and efficient protocols for some multicomponent coupling reactions such as the Suzuki reaction and synthesis of polyhydroquinoline and 2,3-dihydroquinazoline-4-(1H)-one derivatives using a superparamagnetic palladium complex as catalyst have been developed. Graphical abstract
Poly(vinylpyrrolidinium) perchlorate as a new and efficient catalyst for the promotion of the synthesis of polyhydroquinoline derivatives via Hantzsch condensation
poly(vinylpyrrolidinium) perchlorate [PVPH]ClO4} as a new modified polymeric catalyst in the absence of solvent is reported. The title catalyst is easily prepared and characterized using a variety of techniques including infrared spectra, X-ray diffraction, thermal gravimetric analysis, scanning electron microscopy, pH analysis, and Hammett acidity function. Some of the advantages of this novel synthetic method are:
Preparation and characterization of Cu (II) supported on poly(8-hydroxyquinoline-<i>p</i>
-styrene sulphonate) and its application as catalyst for the synthesis of hexahydroquinolines
Cu (II) supported on poly(8‐hydroxyquinoline‐p‐styrenesulfonate) (Cu (II)@PHQSS) was prepared and fully characterized by the different techniques including fourier transform infrared spectroscopy (FT‐IR), 1H NMR, 13C NMR, thermal gravimetric analysis (TGA), differential thermal gravimetric (DTG), differential thermal analysis (DTA), scanning electron microscope (SEM) and energy dispersive X‐ray analysis
的Cu(II)负载在聚(8- hydroxyquinoline- p -styrenesulfonate)(铜(II)@PHQSS)溶液并充分表征由不同的技术,包括傅里叶变换红外光谱(FT-IR),1 H NMR,13 C ^ NMR,热重分析(TGA),差热重分析(DTG),差热分析(DTA),扫描电子显微镜(SEM)和能量色散X射线分析(EDS)。然后,将Cu(II)@PHQSS作为纳米结构催化剂用作合成六氢喹啉的催化剂。
Green and efficient synthesis of acridine-1,8-diones and hexahydroquinolines via a KH2PO4 catalyzed Hantzsch-type reaction in aqueous ethanol
作者:Shi-Jun Yü、Si Wu、Xin-Min Zhao、Cheng-Wei Lü
DOI:10.1007/s11164-016-2814-2
日期:2017.5
A simple, clean, and economical methodology for the synthesis of acridine-1,8-dione and hexahydroquinoline derivatives via Hantzsch-type condensation has been described. This study highlights the development of a new green pathway for the preparation of substituted 1,4-dihydropyridines derivatives. The mild, cheap, and nontoxic potassium dihydrogen phosphate (KH2PO4) is proved to be an efficient catalyst for the above multi-component reaction to get excellent yields. Widely available and mostly benign catalyst, eco-friendly solvent, and easy purification are among the several attractive features.