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。
Metal free synthesis of tetrahydrobenzo[a]xanthenes using orange peel as a natural and low cost efficient heterogeneous catalyst
a facile, efficient and metal free catalytic system has been developed for the synthesis of tetrahydrobenzo[a]xanthene derivatives via a one-potthree-componentcondensation of various aldehydes, 2-naphthol, and dimedone. For the first time, the orange peel as a green, acidic, and low cost natural catalyst with high porosity and high efficiency was used in tetrahydrobenzo[a]xanthenes synthesis procedure
在这项工作中,已经开发了一种简便,高效且不含金属的催化体系,用于通过各种醛,2-萘酚和二甲基酮的一锅三组分缩合反应合成四氢苯并[ a ] x吨衍生物。首次,桔皮作为具有高孔隙率和高效率的绿色,酸性和低成本的天然催化剂在四氢苯并[使用一个]氧杂蒽的合成过程。这种环境友好的新型催化体系可在无溶剂条件下于120°C的条件下以高至极好的收率获得所需的产品。
A facile, one-pot, green synthesis of polysubstituted 4H-pyrans via piperidine-catalyzed three-component condensation in aqueous medium
作者:Guo-Ping Lu、Chun Cai
DOI:10.1002/jhet.528
日期:2011.1
An efficient, one‐pot method was described for the synthesis of various polysubstituted 4H‐pyrans via piperidine catalyzed three‐component condensation in aqueousmedium. The reaction could be promoted effectively by adding sodium dodecyl sulfate to aqueousmedium. J. Heterocyclic Chem., (2010).
Preparation and application of highly efficient and reusable TBAPIL@Si(CH2)3@nano-silica-based nano-catalyst for preparation of benzoxanthene derivatives
作者:Akansha Agrwal、Vipin Kumar、Virendra Kasana
DOI:10.1007/s13738-021-02211-1
日期:2021.10
were synthesized. Both of these were linked through propyltriethoxysilane to prepare a reusable catalyst TBAPIL@Si(CH2)3@silica NPs (TBAPILS). The formation of TBAPIL was checked through Fourier-transforminfrared spectroscopy (FT-IR) and nuclearmagneticresonance (NMR) analysis. X-ray diffraction analysis confirmed the structure of silica NPs and linking of TBPAIL on it. Transmission electron microscopy
Facile synthesis of tetrahydrobenzoxanthenones via a one-pot three-component reaction using an eco-friendly and magnetized biopolymer chitosan-based heterogeneous nanocatalyst
作者:Ali Maleki、Morteza Aghaei、Nakisa Ghamari
DOI:10.1002/aoc.3524
日期:2016.11
nanocomposite was synthesized by an eco‐friendly and simple procedure, and was characterized using scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, X‐ray diffraction and Fourier transform infrared spectroscopy. It was then used for the efficient synthesis of tetrahydrobenzoxanthen‐11‐one derivatives via a one‐pot three‐component condensation of 2‐naphthol, various aldehydes and dimedone in ethanol