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。
An efficient and practical synthesis of benzazolo[2,1-b]quinazolinones and triazolo[2,1-b]quinazolinones catalyzed by nano-sized NS-C4(DABCO-SO3H)2)·4Cl
作者:Omid Goli-Jolodar、Farhad Shirini
DOI:10.1007/s13738-017-1164-3
日期:2017.11
In this study, 4,4′-(butane-1,4-diyl)bis(1-sulfo-1,4-diazabicyclo[2.2.2]octane-1,4-diium)tetrachloride (NS-C4(DABCO-SO3H)2)·4Cl is used as a nano-sized Brönsted acid catalyst for the efficient and preferment synthesis of benzazolo[2,1-b]quinazolinones and triazolo[2,1-b]quinazolinones derivatives. This protocol has many advantages including mild reaction conditions, acceptable reaction times, high
在这项研究中,4,4'-(butane-1,4-diyl)bis(1-sulfo-1,4-diazabicyclo [2.2.2] octane-1,4-diium)tetrachloride(NS-C 4(DABCO -SO 3 H)2)·4Cl用作纳米级布朗斯台德酸催化剂,可高效,优选地合成苯并[2,1- b ]喹唑啉酮和三唑并[2,1- b ]喹唑啉酮衍生物。该方案具有许多优点,包括温和的反应条件,可接受的反应时间,高收率和产物的后处理容易以及催化剂的可重复使用性。
Poly(vinylpyrrolidonium) perchlorate catalyzed one-pot synthesis of tricyclic dihydropyrimidine derivatives
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: An Efficient Eco-friendly Catalyst for One-pot Synthesis of Tricyclic and Tetarcyclic Dihydropyrimidine Derivatives.
A simple and efficient eco-friendly chemical procedures were developed for the synthesis of series of tricyclic and tetarcyclic dihydropyrimidine derivatives in excellent yields via a one-pot, multi-component reaction in the presence of silicasulfuric acid / ethylene glycol catalyst. The Tricyclic dihydropyrimidine derivatives 1a-g (benzo[4,5]imidazo[1,2-a]pyrimidine derivatives) were synthesized
A series of pyrimido[1,2‐a]benzimidazoles were obtained from aldehydes, 2‐aminobenzimidazole and ethyl acetoacetate in good‐to‐excellent yields by a simple, mild, and efficient procedure utilizing N,N,N′,N′‐tetrabromobenzene‐1,3‐disulfonamide (TBBDA) and poly(N‐bromo‐N‐ethylbenzene‐1,3‐disulfonamide) (PBBS) as catalysts.
通过使用N,N,N',N'-的简单,温和且有效的方法,从醛,2-氨基苯并咪唑和乙酰乙酸乙酯中获得了一系列嘧啶[1,2- a ]苯并咪唑,收率良好至优异。四溴苯-1,3-二磺酰胺(TBBDA)和聚(N-溴-N-乙基苯-1,3-二磺酰胺)(PBBS)作为催化剂。
Preparation and characterization of copper/polysulfonamide complex immobilized on geraphene oxide as a novel catalyst for the synthesis of pyrimido[1,2‐a]benzimidazoles
Copper–polysulfonamide complex immobilized on geraphene oxide as a novel heterogeneous catalyst (GO@PSA‐Cu) was synthesized and the structure and morphology of catalyst were characterized with various analytical techniques such as Fourier‐transform infrared spectroscopy, scanning electron microscopy, energy‐dispersive X‐ray, N2 isotherms, elemental mapping, inductively coupled plasma–MS, and thermogravimetric