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
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
Synthesis of a novel and reusable biological urea based acidic nanomagnetic catalyst: Application for the synthesis of 2‐amino‐3‐cyano pyridines
<i>via</i>
cooperative vinylogous anomeric based oxidation
作者:Morteza Torabi、Meysam Yarie、Mohammad Ali Zolfigol
DOI:10.1002/aoc.4933
日期:2019.6
In the current study, a novel and reusable biological urea based nano magnetic catalyst namely Fe3O4@SiO2@(CH2)3‐urea‐benzimidazole sulfonic acid was designed and synthesized. The structure of the titled catalyst was fully characterized using several skills including Fourier transform infrared (FT‐IR) spectroscopy, energy dispersive X‐ray (EDX) analysis, X‐ray diffraction (XRD), scanning electron microscopy
在当前的研究中,设计并合成了一种新型的可重复使用的生物尿素基纳米磁性催化剂,即Fe 3 O 4 @SiO 2 @(CH 2)3-脲-苯并咪唑磺酸。标题催化剂的结构已使用多种技能进行了全面表征,包括傅立叶变换红外(FT-IR)光谱,能量色散X射线(EDX)分析,X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM),热重分析/差热分析(TG / DTG)和振动样品磁力计(VSM)。然后,Fe 3 O 4 @SiO 2 @(CH 2)通过基于乙烯基的端基异构的氧化途径,成功地检测了3-脲-苯并咪唑磺酸用于多组分合成2-氨基-3-氰基吡啶衍生物。
A concise and versatile synthesis of 2-amino-3-cyanopyridine derivatives in 2,2,2-trifluoroethanol
作者:Samad Khaksar、Mandana Yaghoobi
DOI:10.1016/j.jfluchem.2012.06.009
日期:2012.10
Trifluoroethanol (TFE) is found to be an efficient and recyclable medium in promoting one-pot, four-component coupling reactions of aldehydes, ketones, malononitrile, and ammonium acetate to afford the corresponding 2-amino-3-cyanopyridine derivatives in high yields. The solvent (TFE) can be readily separated from reaction products and recovered in excellent purity for direct reuse. (C) 2012 Elsevier B.V. All rights reserved.
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