由香草醛,邻苯二胺和N,N-二苯基氨基甲酰氯合成了新型咪唑荧光探针(2)。其结构的特征在于荧光光谱,UV-Vis光谱,1 H NMR,13 C NMR和高分辨率质谱(HRMS)。此外,在THF / MeOH溶液中研究了其聚集诱导的发射(AIE)功能。此外,荧光猝灭实验结果表明,化合物2是潜在的小有机分子荧光探针,对硝基芳香族化合物显示出高选择性和敏感性。此外,该探针可用于三氟拉林的测定,具有快速响应和稳定的特点。探针的荧光响应与三氟拉林的浓度在10至100μM之间表现出良好的线性相关性,并且检出限(LOD)低至5.066μM。最终,该探针成功地用于测定实际样品中三氟拉林的含量,回收率为91.1%至111.2%,表明该探针的适用性和可靠性。
DOI:
10.1016/j.saa.2021.119880
作为产物:
描述:
N,N'-bis(4-hydroxy-3-methoxybenzylidene)-1,2-phenylenediamine 在
对甲苯磺酸 作用下,
以
neat (no solvent) 为溶剂,
以92%的产率得到4-(1-(4-hydroxy-3-methoxybenzyl)-1H-benzo[d]imidazol-2-yl)-2-methoxyphenol
参考文献:
名称:
Facile Synthesis of 1,2-Disubstituted Benzimidazoles Usingp-Toluenesulfonic Acid through Grinding
Method
摘要:
An efficient synthetic method for the highly selective synthesis of pharmacologically active 1,2-disubstituted benzimidazole derivatives fromo-phenylenediamine and various aromatic aldehydes catalyzed byp-toluenesulfonic acid through grinding under solvent-free condition is described. The reaction requires the catalyst only during the conversion of intermediateN,N '-dibenzylidene-o-phenylenediamine into the desired product. The products were obtained within a short time with good yields by using only a mortar and pestle, which makes the proposed method convenient and cost-effective.
Chitosan-supported Fe3O4 nanoparticles: a magnetically recyclable heterogeneous nanocatalyst for the syntheses of multifunctional benzimidazoles and benzodiazepines
作者:Ali Maleki、Nakisa Ghamari、Maryam Kamalzare
DOI:10.1039/c3ra47366j
日期:——
An environmentally benign and clean biopolymer-based heterogeneous nanocatalyst was prepared and its properties and morphology were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). Then, its catalytic activity was investigated in two important organic reactions. In these reactions, efficient and selective syntheses of 1,2-disubstituted benzimidazole and 1,5-benzodiazepine derivatives were carried out using 1,2-diamines and aldehydes or ketones in the presence of a catalytic amount of magnetically recoverable chitosan-supported iron oxide nanoparticles (Fe3O4/chitosan), as a biodegradable nanocomposite, in ethanol at ambient temperature in high yields. The Fe3O4/chitosan nanocatalyst can be recovered easily and reused without any significant loss of the catalytic activity.
Natural Bio-surfactant for Pseudomulticomponent Synthesis of 2-Aryl-1- aryl Methyl-1H-benzimidazoles
作者:Smita T. Morbale、Sachin K. Shinde、Shashikant A. Damate、Madhukar B. Deshmukh、Suresh S. Patil
DOI:10.2174/1570178614666170710115331
日期:2017.12.11
Green chemistry emphasizes the development of environmentally benign chemical processes
and technologies. Pseudo-multicomponent synthesis of 2-aryl-1-arylmethyl-1H-benzimidazoles
using o-phenylenediamine and aromatic aldehydes is carried out by Bronsted acid type bio-surfactant
as a catalyst. The green features of this method include the use of biodegradable catalyst obtained from
renewable resource i.e. Citrus Limonium extract as bio-surfactant type Bronsted acid, which provides a
micellar media for effective cyclocondensation. The critical micellar concentration (cmc) of biosurfactant
was determined by conductivity method and visualized by light microscopy measurement. Identity
of all pure compounds was ascertained on the basis of FT-IR, 1H NMR and 13C NMR spectroscopic
techniques.
Nano indium oxide: an efficient catalyst for the synthesis of 1,2-disubstituted benzimidazoles in aqueous media
作者:Sougata Santra、Adinath Majee、Alakananda Hajra
DOI:10.1016/j.tetlet.2012.02.021
日期:2012.4
Synthesis of 1,2-disubstitutedbenzimidazoles has been developed by the condensation of diamine with aldehydes using nano In2O3 as an efficient catalyst under mild reaction conditions in aqueous media. The procedure is applicable to aryl, aliphatic, heteroaryl aldehydes. In2O3 nanoparticles are recyclable without the loss of significant catalytic activity.
通过在水介质中温和的反应条件下,使用纳米In 2 O 3作为有效的催化剂,通过二胺与醛的缩合反应,开发了1,2-二取代的苯并咪唑的合成方法。该方法适用于芳基,脂族,杂芳基醛。In 2 O 3中的纳米颗粒是可回收的,而不会损失明显的催化活性。
Efficient Synthesis of 2-Aryl-1-arylmethyl-1<i>H</i>-benzimidazoles in Ball Mill without Solvent
2‐Aryl‐1‐arylmethyl‐1H‐benzimidazoles were prepared in excellent yields by the condensation of o‐phenylenediamine with aldehydes under mechanically activated solvent‐free conditions in ballmill using FeCl3·6H2O as the catalyst.
A Cu (NO3)2.3H2O catalysed facile synthesis of substituted 4(3H)-quinazolinones and benzimidazoles
作者:G A N K DURGAREDDY、R RAVIKUMAR、S RAVI、SRINIVAS R ADAPA
DOI:10.1007/s12039-012-0343-0
日期:2013.1
One pot synthesis of alkyl, aryl, heteroaryl mono(2)substituted 4(3H)-quinazolinones and 2-aryl or heteroaryl, 1-arylmethyl or heteroarylmethyl -1H-benzimidazoles using a water soluble Cu (NO3)2.3H2O catalyst at room/ambient temperature in excellent yield. One pot synthesis of alkyl, aryl, heteroaryl mono(2)substituted 4(3H)-quinazolinones and 2-aryl or heteroaryl, 1-arylmethyl or heteroarylmethyl-1H-benzimidazoles