Experimental and theoretical studies of the nanostructured {Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@(CH<sub>2</sub>)<sub>3</sub>Im}C(CN)<sub>3</sub>catalyst for 2-amino-3-cyanopyridine preparation<i>via</i>an anomeric based oxidation
作者:Mohammad Ali Zolfigol、Mahya Kiafar、Meysam Yarie、Avat(Arman) Taherpour、Mahdi Saeidi-Rad
DOI:10.1039/c6ra12299j
日期:——
2-Amino-4,6-diphenylnicotinonitriles were prepared by using Fe3O4@SiO2@(CH2)3Im}C(CN)3 as a nanostructured catalyst with an ionic liquid tag under solvent free and benign conditions. Experimental evidence and theoretical studies confirmed that the final step of the synthetic pathway proceeded via an anomeric based oxidation mechanism. A good range of aromatic aldehydes were condensed with acetophenone
以Fe 3 O 4 @SiO 2 @(CH 2)3 Im} C(CN)3作为具有离子液体标签的纳米结构催化剂,在无溶剂和良性条件下,制备了2-氨基-4,6-二苯基烟腈。实验证据和理论研究证实,合成途径的最后一步是通过基于异头物的氧化机理进行的。一系列芳香醛与苯乙酮衍生物,丙二腈和乙酸铵缩合,从而在较短的反应时间内即可获得相应的产物,并且产率高至高。
Four-Component Synthesis of 2-Amino-3-Cyanopyridine Derivatives Catalyzed by Cu@imineZCMNPs as a Novel, Efficient and Simple Nanocatalyst Under Solvent-Free Conditions
was investigated for synthesis of 2-amino-3-cyanopyridine derivatives via a one-pot four-component reaction of various types of aldehydes, acetophenone, malononitrile, and ammonium acetate in the presence of 10 mg Cu@imineZCMNPs catalyst. The favorable products were achieved with high quantitative yields and easy isolation of products in short reaction times under solvent-free conditions. The prepared
problems. In order to develop novel antitumoragents, we synthesized 3,4-dihydropyrimidine-2(1H)-one (DHPM) and 2,6-diaryl-substituted pyridine derivatives as potential antitumor structures and evaluated their cytotoxic effects against several cancer cell lines. An easy and convenient method is reported for the synthesis of these derivatives, employing cobalt ferrite (CoFe 2 O 4 @SiO 2 -SO 3 H) magnetic nanoparticles
Unveiling the urease like intrinsic catalytic activities of two dinuclear nickel complexes towards the <i>in situ</i> syntheses of aminocyanopyridines
作者:Bidyut Kumar Kundu、Pragti、Soumen Biswas、Abhijit Mondal、Shyamalava Mazumdar、Shaikh M. Mobin、Suman Mukhopadhyay
DOI:10.1039/d1dt00108f
日期:——
Designing metal complexes as functional models for metalloenzymes remains one of the main targets in synthetic bioinorganic chemistry. Furthermore, the utilization of the product(s) derived from the catalytic reaction for subsequent organic transformation that occurs in biological systems is an even more difficult challenge for biochemists. Urease, the most efficient enzyme known, catalyzes the hydrolysis
设计金属配合物作为金属酶的功能模型仍然是合成生物无机化学的主要目标之一。此外,将催化反应衍生的产物用于生物系统中发生的后续有机转化对生物化学家来说是一个更加困难的挑战。尿素酶是已知的最有效的酶,可催化尿素水解,其活性位点含有必需的双核 Ni II簇。受脲酶催化特性的启发,两种二镍 ( II ) 配合物即. Ni 2 L 1 2 (OAc) 2 (H 2 O) ( 1 ) 和 Ni 2 L2 2 (OAc) 2 (H 2 O) ( 2 ) [ HL1 = 2,4-二甲基-6-[(2'-二甲基氨基乙基)甲基氨基]甲基}-苯酚和HL2 = 2,4-二氯-6 -[(2'-二甲基氨基乙基)甲基氨基]甲基}-苯酚]已在本报告中合成和表征。两种复合物都显示出尿素酶活性,从水溶液中的尿素中释放氨。已经研究了可能的机理途径和反应动力学。此外,释放的氨已用于一锅法合成生物活性产物,如 2-氨基-3-氰基吡
Divergent Syntheses of 2-Aminonicotinonitriles and Pyrazolines by Copper-Catalyzed Cyclization of Oxime Ester
作者:Qifan Wu、Yan Zhang、Sunliang Cui
DOI:10.1021/ol500094w
日期:2014.3.7
Copper-catalyzed cyclization of an oxime ester toward divergent heterocycle synthesis is reported. Oxime ester serves as an enamine precursor to cyclize with malononitrile and aldehydes for access to 2-aminonicotinonitriles in a one-pot reaction, while cyclizing with N-sulfonylimines leads to synthesis of pyrazolines.