使用不同的分析技术成功合成并表征了尖刺镍纳米颗粒,包括傅里叶变换红外光谱(FT-IR)、场电子扫描电子显微镜(FE-SEM)、透射电子显微镜(TEM)、粉末X射线衍射、振动样品磁力测定(VSM) 和能量色散 X 射线光谱 (EDS)。这些具有大表面积和磁性的纳米颗粒被精心用于从芳香醛、活性亚甲基化合物和 2-氨基苯并咪唑合成 1,2-二氢嘧啶并[1,2-a]苯并咪唑及其衍生物。室温下白色 LED 照射。该方法反应条件温和环保,选择性高,产物收率优异,且催化剂可回收和重复使用。此外,制备的苯并咪唑衍生物6d、6k和8e对胃肠道线虫模型S. obvelata表现出积极的驱虫活性。
Ferrocene-Functionalized Dithiocarbamate Zinc(II) Complexes as Efficient Bifunctional Catalysts for the One-Pot Synthesis of Chromene and Imidazopyrimidine Derivatives via Knoevenagel Condensation Reaction
作者:Anamika、Chote Lal Yadav、Michael G. B. Drew、Kamlesh Kumar、Nanhai Singh
DOI:10.1021/acs.inorgchem.1c00162
日期:2021.5.3
analyses, IR, UV–vis, and 1H and 13C1H} NMR spectroscopic techniques. The solid-statestructures of complexes 1, 3, and 4 have been determined by single-crystal X-ray crystallography as well as powder X-ray diffraction. Single-crystal X-ray crystallography revealed a monomeric structure for complex 1 but 1Dpolymericstructures for complexes 3 and 4. In all complexes, dithiocarbamate ligands are bonded
A simple and efficient procedure for the synthesis of benzo[4,5]imidazo[1,2-α]pyrimidine and 2-amino-4-substituted-1,4-dihydrobenzo[4,5]imidazolo[1,2-α]pyrimidine-3-carbonitrile derivatives using poly(vinylpyrrolidonium) perchlorate [PVPH]ClO4} as a newly reported, modified polymeric catalyst is reported. Some of the advantages of this novel synthetic method are: easy preparation of the catalyst,
Silica sulfuric acid/ethylene glycol as an efficient catalyst for the synthesis of benzo[4,5]imidazo[1,2-<i>a</i>]pyrimidine-3-carbonitrile derivatives
作者:Wahid M. Basyouni、Samir Y. Abbas、Nagwa M. Abdelazeem、Khairy A. M. El-Bayouki、Mohamed Y. El-Kady
DOI:10.1080/00397911.2019.1652322
日期:2019.11.17
developed for the synthesis of new benzo[4,5]imidazo[1,2-a]pyrimidine-3-carbonitrile derivatives in excellent yields. The synthesis was achieved through the reaction of 2-aminobenzimidazole, aldehydes and active nitriles (malononitrle or ethyl cyanoacetae) in the presence of silica sulfuric acid/ethylene glycol. This protocol offers very short reaction times (in some cases, reaction times were reduced to five
Starch functionalized magnetite nanoparticles: A green, biocatalyst for one-pot multicomponent synthesis of imidazopyrimidine derivatives in aqueous medium under ultrasound irradiation
efficient and environmentally friendly one-pot multicomponent synthesis of biologically fascinating imidazopyrimidine derivatives by the reaction of aromatic aldehydes, active methylene compounds and 2-aminobenzimidazole under ultrasonic irradiation have been developed. The reaction is catalyzed by starch functionalized magnetite nanoparticles (s-Fe3O4). The salient features of the present methodology
Facile and efficient synthesis of pyrimido[1,2-a]benzimidazole and tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-one derivatives using Brönsted acidic ionic liquid supported on rice husk ash (RHA-[pmim]HSO4)
In this work, a green and efficient procedure has been reported for the synthesis of pyrimido[1,2-a]benzimidazole and tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-onederivatives using Brönsted acidic ionicliquid supported on rice husk ash (RHA-[pmim]HSO4) as the catalyst. These reactions were performed at 100 °C under solvent-free conditions with high yields in very short reaction times.
在这项工作中,已经报道了使用布朗斯台德酸性离子液体载体合成嘧啶基[1,2- a ]苯并咪唑和四氢苯并咪唑并[ 2,1- b ]喹唑啉-1(2 H)-one衍生物的绿色高效方法。以稻壳灰(RHA- [pmim] HSO 4)为催化剂。这些反应是在100°C无溶剂条件下以极短的反应时间高收率进行的。