A Simple Method for the Preparation of 2-Amino-4-aryl-3-cyanopyridines by the Condensation of Malononitrile with Aromatic Aldehydes and Alkyl Ketones in the Presence of Ammonium Acetate
Synthesis of cobalt tetra-2,3-pyridiniumporphyrazinato with sulfonic acid tags as an efficient catalyst and its application for the synthesis of bicyclic <i>ortho</i>-aminocarbonitriles, cyclohexa-1,3-dienamines and 2-amino-3-cyanopyridines
作者:Mohammad Dashteh、Mohammad Ali Zolfigol、Ardeshir Khazaei、Saeed Baghery、Meysam Yarie、Sajjad Makhdoomi、Maliheh Safaiee
DOI:10.1039/d0ra02172e
日期:——
ortho-Aminocarbonitriles, cyclohexa-1,3-dienamines and 2-amino-3-cyanopyridines were synthesized by [Co(TPPASO3H)]Cl as an efficient pyridiniumporphyrazinato based catalyst.
Sulfonic acid-functionalized graphitic carbon nitride composite: a novel and reusable catalyst for the one-pot synthesis of polysubstituted pyridine in water under sonication
作者:Mahtab Edrisi、Najmedin Azizi
DOI:10.1007/s13738-019-01820-1
日期:2020.4
multicomponent reaction of aromatic aldehydes with acyclic and cyclic ketones, malononitrile and ammonium acetate was afforded the pyridine derivatives in good-to-excellent yields. In view of eco-friendly and economic considerations, this approach offers a straightforward and convenient route to generate biologically active pyridine derivative in an environmentally friendly manner. The Fe3O4@g-C3N4-SO3H
作为一种有趣的可持续性软纳米材料,石墨碳氮化物因其独特的电子结构和化学稳定性而受到了广泛的学科关注。在极性和强酸性磺化磁性石墨氮化碳(Fe 3 O 4 @gC 3 N 4 -SO 3)存在下的一系列多取代吡啶的超声辅助制备H)在较温和较快的反应条件下在水中作为绿色介质的报道。芳族醛与无环和环状酮,丙二腈和乙酸铵的一锅顺序多组分反应以良好或优异的产率得到了吡啶衍生物。考虑到生态友好和经济考虑,该方法提供了以环境友好的方式产生生物活性吡啶衍生物的直接且方便的途径。Fe 3 O 4 @gC 3 N 4 -SO 3 H在几个反应组上显示出高稳定性和可重复使用性,而没有明显的活性损失,因此,该方法是一种廉价且环保的方法。
An efficient protocol for the one-pot multicomponent synthesis of polysubstituted pyridines by using a biopolymer-based magnetic nanocomposite
作者:Ali Maleki、Abbas Ali Jafari、Somayeh Yousefi、Vahid Eskandarpour
DOI:10.1016/j.crci.2015.09.002
日期:2015.12
Résumé A biopolymer cellulose-based magnetic composite nanocatalyst was prepared and characterized by using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). Then, it was used efficiently in the multicomponent synthesis of polysubstituted pyridines under mild reaction conditions and using an easy work-up procedure at room temperature in ethanol. The nanocatalyst can be recovered easily and reused several times without significant loss of catalytic activity. Supplementary Materials: Supplementary materials for this article are supplied as separate files: mmc1.doc mmc2.zip mmc3.doc mmc4.doc
Nanomagnetically modified vitamin B
<sub>3</sub>
(Fe
<sub>3</sub>
O
<sub>4</sub>
@Niacin): An efficient and reusable green biocatalyst for microwave‐assisted rapid synthesis of 2‐amino‐3‐cyanopyridines in aqueous medium
Superparamagnetic nanoparticles of modified vitamin B3 (Fe3O4@Niacin) represent a new, efficient and green biocatalyst for the one‐pot synthesis of 2‐amino‐3‐cyanopyridine derivatives via four‐component condensation reaction between aldehydes, ketones, malononitrile, and ammonium acetate undermicrowaveirradiation in water. This new magnetic organocatalyst was easily isolated from the reaction mixture by
Poly N,N-dimethylaniline-formaldehyde supported on silica-coated magnetic nanoparticles: a novel and retrievable catalyst for green synthesis of 2-amino-3-cyanopyridines
作者:Sajad Asadbegi、Mohammad Ali Bodaghifard、Akbar Mobinikhaledi
DOI:10.1007/s11164-017-3200-4
日期:2020.3
Preparation and application of novel and reusable magneticnanoparticles with poly N,N-dimethylaniline-formaldehyde support as a heterogeneous basic catalyst have been described. The reported catalyst was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction patterns, transmission electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric