efficient, one-pot synthesis of functionalized tetrahydropyridines by multicomponent condensation of ethyl acetoacetate, two equivalents of aromaticaldehyde, and aromatic amine in the presence of a catalytic amount of NO2-Fe(III)PcCl@C is reported. In this way, a series of pharmacologically interesting substitutedpyridine derivatives were obtained in moderate to good yields.
Design, preparation and characterization of a new ionic liquid, 1,3-disulfonic acid benzimidazolium chloride, as an efficient and recyclable catalyst for the synthesis of tetrahydropyridine under solvent-free conditions
作者:Mohsen Abbasi
DOI:10.1039/c5ra10699k
日期:——
acid benzimidazolium chloride as a new ionic liquid, is synthesized, and characterized by studying its FT-IR, 1H NMR, 13C NMR as well as massspectra. This ionic liquid is used as an efficient, homogeneous and recyclable catalyst for synthesis of highly functionalized tetrahydropyridine via one-pot multi-component condensation of aromatic aldehydes, ethyl acetoacetate, and anilines under solvent-free
在目前的工作中,合成了作为新型离子液体的1,3-二磺酸苯并咪唑鎓盐,并对其FT-IR,1 H NMR,13 C NMR以及质谱进行了表征。该离子液体用作高效,均质和可回收的催化剂,可通过以下途径合成高度官能化的四氢吡啶在无溶剂条件下,单锅多组分缩合芳族醛,乙酰乙酸乙酯和苯胺。当前的合成路线是一种绿色方案,具有几个优点,例如产品收率高,反应时间短,反应条件温和,化学废物最少,后处理程序容易。此外,该催化剂可以重复使用和回收至少四次而没有明显的活性损失。
Synthesis, characterization and first application of keggin-type heteropoly acids supported on silica coated NiFe<sub>2</sub>O<sub>4</sub>as novel magnetically catalysts for the synthesis of tetrahydropyridines
作者:Hossein Eshghi、Amir Khojastehnezhad、Farid Moeinpour、Mehdi Bakavoli、Seyed Mohammad Seyedi、Mohsen Abbasi
DOI:10.1039/c4ra05133e
日期:——
In this study, two heteroploly acids with Keggin structures (phosphotungestic acid (PWA) and phosphomolybdic acid (PMA)) have been supported on silica coated nickel ferrite nanoparticles (NiFe2O4@SiO2). The synthesized catalysts were characterized by several methods (FT-IR, SEM, TEM, VSM, XRD, BET and ICP-AES), and the catalytic activities of these new and magnetic catalysts in synthesis of tetrahydropyridine derivatives have been investigated. These new catalysts showed that they can carry out reactions at room temperature in a short time and under solvent-free conditions. Moreover, the obtained results indicated that PWA supported NiFe2O4@SiO2 is a stronger acid than PMA to run these reactions. More importantly, the catalysts were easily isolated from the reaction mixture by a magnetic bar and reused at least five times without significant degradation in their activities.
Ruthenium Chloride Catalysed Multicomponent Reaction for Efficient and One-Pot Synthesis of Functionalised Tetrahydropiperidines at Room Temperature
作者:Sedigheh Mohammadi、Mohsen Abbasi
DOI:10.3184/174751915x14230617481292
日期:2015.2
a Lewis acid catalyst for the one-pot three-component synthesis of highly functionalised tetrahydropiperidines from aromatic aldehydes, anilines and ethylacetoacetate in ethanol at ambient temperature without any ligand or activator. The simple experimental procedure, high yields of products, no need for column chromatography, and short reaction times compared to other catalysts are some of the advantages
Design of ionic liquid sulfonic acid pyridinium hydrogen sulfate as an efficient, eco-friendly, and reusable catalyst for one-pot synthesis of highly functionalized tetrahydropyridines
作者:Sedigheh Mohammadi、Mohsen Abbasi
DOI:10.1007/s11164-015-1934-4
日期:2015.11
Novel ionic liquid sulfonicacid pyridinium hydrogen sulfate ([Pyridine-SO3H]HSO4) is synthesized and characterized by various techniques such as FT-IR, 1H NMR, 13C NMR, TG, DTG, as well as mass spectra. This ionic liquid is used as an efficient, homogeneous, and recyclable catalyst for one-pot synthesis of highly functionalized tetrahydropyridines from the three-component condensation of aromatic
合成了新型离子液体磺酸吡啶鎓硫酸氢盐([吡啶-SO 3 H] HSO 4),并通过多种技术进行了表征,例如FT-IR,1 H NMR,13 C NMR,TG,DTG以及质谱。这种离子液体用作无溶剂条件下由芳族醛,乙酰乙酸乙酯和取代的苯胺的三组分缩合反应一锅合成高官能化四氢吡啶的有效,均质和可循环使用的催化剂。该方案的主要优点是反应时间短,产率高,温和清洁的条件以及多次重复使用时间而不会明显降低催化活性。