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。
Efficient iron catalyzed ligand-free access to acridines and acridinium ions
作者:Susanta Mandal、Karan Chhetri、Samuzal Bhuyan、Biswajit G. Roy
DOI:10.1039/d0gc00617c
日期:——
important classes of compounds in terms of their usefulness in pharmaceuticals, materials, dyes and photo-catalysis. Here we present an unconventional FeCl3-alcohol catalysed one-pot method for their synthesis directly from aldehydes, 1,3-cyclohexanedione and amines. This method efficiently merged high atom-economy and diversity of multicomponent reaction with novel iron catalyzed dehydrogenation, using
Hollow Fe3O4@DA-SO3H: an efficient and reusable heterogeneous nano-magnetic acid catalyst for synthesis of dihydropyridine and dioxodecahydroacridine derivatives
highly stable and efficient super-paramagnetic catalyst, H-Fe3O4@DA-SO3H, involving hollow morphology of Fe3O4 as core and dopamine as shell was prepared through hydrothermal template-free method. It has been used as a new and recoverable catalyst for various one-pot multi-component organic reactions such as synthesis of 1,4-dihydropyridine (1,4-DHP) and 1,8-dioxodecahyroacridine derivatives. The new magnetic
摘要在这项工作中,首次涉及高度稳定和高效的超顺磁性催化剂H-Fe 3 O 4 @ DA-SO 3 H,涉及中空形态的Fe 3 O 4采用无水热模板法制备了以多巴胺为核,多巴胺为壳的方法。它已被用作新的可回收催化剂,用于各种一锅多组分有机反应,例如合成1,4-二氢吡啶(1,4-DHP)和1,8-二氧杂脱氧代ac啶衍生物。对该新型磁性催化剂进行了不同的分析,包括X射线粉末衍射(XRD),傅里叶变换红外光谱(FT-IR),场发射扫描电子显微镜(FE-SEM),透射电子显微镜(TEM),能量色散X射线光谱(EDX),振动样品磁力计(VSM)和热重分析(TGA)。此外,制备的空心Fe 3 O 4的ρ 壳计算出的微颗粒仅比固态球状Fe 3 O 4轻。常规地,使用外磁体回收催化剂,并且至少在六个连续的运行中重复使用催化剂,而没有明显损失其活性。 图形概要
Water mediated reactions: TiO<sub>2</sub>and ZnO nanoparticle catalyzed multi component domino reaction in the synthesis of tetrahydroacridinediones, acridindiones, xanthenones and xanthenes
Tetrahydroacridine-1,8-(2H,5H,9H,10H)-diones4from 1,3-cyclohexanedione and/or dimedone 1,2-chloro-3-formylquinoline2and anilines3in water at 90 °C were obtained by domino reaction approach.
Polyethylene glycol-mediated synthesis of decahydroacridine-1,8-diones catalyzed by ceric ammonium nitrate
作者:Mazaahir Kidwai、Divya Bhatnagar
DOI:10.2478/s11696-010-0070-2
日期:2010.1.1
Polyethylene glycol was found to be an inexpensive non-toxic and effective medium for one pot synthesis of high yields of decahydroacridine-1,8-diones in the presence of cericammoniumnitrate as the catalyst. Moreover, the solvent can be recovered and reused.