Diastereoselective Synthesis of Symmetrical and Unsymmetrical Tetrahydropyridines Catalyzed by Bi(III) Immobilized on Triazine Dendrimer Stabilized Magnetic Nanoparticles
作者:Beheshteh Asadi、Amir Landarani-Isfahani、Iraj Mohammadpoor-Baltork、Shahram Tangestaninejad、Majid Moghadam、Valiollah Mirkhani、Hadi Amiri Rudbari
DOI:10.1021/acscombsci.6b00180
日期:2017.6.12
the first time from a five-component Fe3O4@TDSN-Bi(III)-catalyzed reaction of aryl aldehydes, aryl amines, and ethyl acetoacetate. This magnetically separable catalyst enabled the selective incorporation of two different aryl amines or two different aryl aldehydes into the product, and provided excellent yields, short reaction times, mild reaction conditions, satisfactory catalyst recyclability, and
首次从五组分Fe 3 O 4 TDSN-Bi(III)催化的芳基醛,芳基胺和乙酰乙酸乙酯的反应中获得不对称的1,2,5,6-四氢吡啶-3-羧酸酯。该磁性可分离的催化剂能够将两种不同的芳基胺或两种不同的芳基醛选择性地掺入产物中,并提供优异的收率,较短的反应时间,温和的反应条件,令人满意的催化剂可回收性和较低的催化剂负载量。
NO2-Fe(III)PcCl@C -catalyzed one-pot synthesis of tetrahydropyridine derivatives
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.
Moreover, some of themhavebeenfoundtobeusefulasinhibitorsofaminopeptidaseandalpha-glucosidase. Numerous recent methods reported for the synthesis of highly substituted piperidines use various catalytic systems such as bismuth nitrate, molecular iodine, bromodimethyl-sulfonium bromide (BDMS), tetra(n-butyl)ammonium tribromide (TBATB), InCl3, 21 CAN, ZrOCl2.8H2O, 23 picric acid, ionicliquids, ZrCl4, 26
Fe(NO3)3·9H2O is used as an efficient and effective catalyst for the one‐pot three‐component synthesis of highlyfunctionalizedpiperidines from aromatic aldehydes, anilines and b–ketoesters in ethanol at ambient temperature. This procedure includes some important aspects like the easy work‐up, no need to column chromatography, simple and readily available precursors, and good to high 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。