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Transition metal-free-C-H functionalization of tertiary amines catalysed/promoted by acids: A brief review 无过渡金属酸催化/促进叔胺-C-H功能化:综述
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-03-09 DOI: 10.2174/1570193x20666230309091635
P. Baruah, Mohit L. Deb
C-H Functionalization of -carbon of tertiary amines has been of great importance for the past two decades as N-heterocycles can be synthesized by this approach and these heterocycles are highly useful as drugs or drug precursors in the pharmaceutical industry. In this review article, we have summarized only the -C-H functionalization reactions of tertiary amines that are catalysed or promoted by acids. These C-H functionalization reactions are usually catalysed by transition metal salts, although metal-free catalysts are also used. However, several such reactions have been reported that are efficiently catalysed by acids. They are cost-effective, have a simple purification process, less sensitive to air/moisture, and are relatively environmentally benign. However, this area has not received enough focus due to the lack of review articles, which encouraged us to write this review.
C-H的官能化-叔胺的碳在过去二十年中具有非常重要的意义,因为通过这种方法可以合成N-杂环,并且这些杂环在制药工业中作为药物或药物前体是非常有用的。在这篇综述文章中,我们只总结了-由酸催化或促进的叔胺的C-H官能化反应。这些C-H官能化反应通常由过渡金属盐催化,尽管也使用不含金属的催化剂。然而,已经报道了几种由酸有效催化的这样的反应。它们具有成本效益,净化过程简单,对空气/湿气不太敏感,并且相对无害环境。然而,由于缺乏综述文章,这一领域没有得到足够的关注,这鼓励我们撰写这篇综述。
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引用次数: 0
Gold-catalyzed reactions of substituted 1,5-diynes: recent advances and their chemistry 金催化取代1,5-二炔的反应及其化学研究进展
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-03-02 DOI: 10.2174/1570193x20666230302114722
Suneel Kanaparthy, Bharath Kumar Perla, Damodar Kongara
Diynes are identified as exceptionally potent and superior substrates in gold-catalyzed organic transformations. Gold (I) and gold (III) complexes exhibit unique activity towards diynes, encouraging the nucleophilic addition of different functional groups both inter and intra- molecularly. In this review, particularly, we focused on recent advances in gold-catalyzed reactions of 1,5-diynes along with their mechanistic aspects. These reactions are interesting for constructing molecular complexity, medicinal chemistry, and material science.
在金催化的有机转化中,炔烃被认为是非常有效和优越的底物。金(I)和金(III)络合物对双炔表现出独特的活性,促进分子间和分子内不同官能团的亲核加成。在这篇综述中,我们特别关注了金催化1,5-二炔反应的最新进展及其机理。这些反应对于构建分子复杂性、药物化学和材料科学都很有趣。
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引用次数: 0
Functional Modification of Meta-aramid: A Review 间位芳纶功能改性研究进展
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-03-02 DOI: 10.2174/1570193x20666230302114735
Jinmei Du, Zheng Zhang, Xiaoyan Wang, Changhai Xu, Yang Jiang
Aromatic polyamides, meta-aramid, high-performance polymers, copolymerization, surface grafting, functional modification.
芳香族聚酰胺,间位芳纶,高性能聚合物,共聚,表面接枝,功能改性。
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引用次数: 0
Chemistry of Thieno[2,3-c]quinoline derivatives part (VII), Reactivities, and Biological Activities 噻吩并[2,3-c]喹啉衍生物的化学第(VII)部分,反应性和生物活性
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-03-01 DOI: 10.2174/1570193x20666230301153215
M. Gouda, Rayan M. Alansari, A. Abu‐Hashem, Abdel-Rhman B. A. El-Gazzar, Ahmed A. M. Abdelgawad, M. A. Salem
In this review, numerous thieno[2,3-c]quinoline derivatives (TQs2, 3-c) are presented from a variety of angles, including various preparation and processing techniques, using cutting-edge equipment. Numerous chemical processes in this review demonstrate how (TQs2, 3-c) were made from arylamines, ketones, aldehydes, carboxylic acids, and other chemical reagents. The amidation, tandem C-C and C-N bond creation accelerated by palladium, Vilsmeier reaction, and Pictet-Spengler chemical reactions were used to shed light on how (TQs2, 3-c) was made.
本文从多个角度介绍了噻吩[2,3-c]喹啉衍生物(TQs2, 3-c),包括各种制备和加工技术,并采用了先进的设备。在这篇综述中,许多化学过程展示了如何从芳胺、酮类、醛类、羧酸和其他化学试剂中制备(TQs2, 3-c)。通过钯加速的酰胺化、串联C-C和C-N键生成、Vilsmeier反应和Pictet-Spengler化学反应,阐明了(TQs2, 3-c)的生成过程。
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引用次数: 0
Synthesis of Oxa-bridged Medium-Sized Carbocyclic Rings 氧桥型中型碳环的合成
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-03-01 DOI: 10.2174/1570193x20666230118162517
Min-Shou Wang, Min Pu, Xu Li
Natural products with oxa-bridged medium-sized carbocyclic ring structure units play an important role in nature. Therefore, developing novel and efficient methods is essential for synthesizing complex natural products containing oxygen-bridged rings. In this article, progress toward the synthesis of oxygen-bridged seven and eight-membered rings is reviewed in terms of the strategies employed.
具有氧桥式中等碳环结构单元的天然产物在自然界中起着重要作用。因此,开发新的高效方法是合成含氧桥环的复杂天然产物的必要条件。本文就氧桥式七元环和八元环的合成策略进行了综述。
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引用次数: 0
Meet the Editorial Board Member 会见编辑委员会成员
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-03-01 DOI: 10.2174/1570193x2002221208152932
D. Lewis
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引用次数: 0
Azo Based Chromogenic Sensor: An Approach for Naked Eye Detection of Biologically Relevant Anions and Metal Cations 偶氮染料显色传感器:一种肉眼检测生物相关阴离子和金属阳离子的方法
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-02-28 DOI: 10.2174/1570193x20666230228115500
Kanchan Damade, Dhananjay Hiralal More
It was previously reported that azo compounds are vigorous and chemically stable compounds and well-known chromophores. Having different chromophores, the azo dyes act as probing units for capturing the charged particles either by electron transfer or deprotonation mechanisms. The probing efficiency usually exhibits in the magnitude of variations in UV absorbance, NMR peaks and visually observed color changes. The sensing application is a prerequisite for numerous analytical techniques involved in pharmaceutical as well as pathological discipline. In the last two decades, numerous azo based sensors have been developed, which render low cost and effective sensing approaches towards ionic diagnosis through instantaneous eye beaming chromogenic change. This sensing approach is simple, cost-effective, and precise and provides reliable quantitative and qualitative statistics of an analyte present in a complex environment. Our present study culminates the recent progress on the synthesis of azo compounds and their chromogenic sensing application towards various reactive analytes through reviewing spectral variations and colorimetric observations. This review article assesses the potential of azo dyes in chromogenic sensing for different analytes. We believe this review will be of interest and important for researchers working on designing azo-based chromogenic sensors.
以前有报道称,偶氮化合物是活性强、化学稳定的化合物和众所周知的发色团。偶氮染料具有不同的发色团,通过电子转移或去质子化机制作为探测单元捕获带电粒子。探测效率通常表现为UV吸收率、NMR峰和视觉观察到的颜色变化的变化幅度。传感应用是涉及药物和病理学学科的许多分析技术的先决条件。在过去的二十年里,已经开发了许多基于偶氮的传感器,这些传感器通过即时的眼睛发光变色为离子诊断提供了低成本和有效的传感方法。这种传感方法简单、成本效益高、精确,并提供复杂环境中存在的分析物的可靠定量和定性统计数据。我们目前的研究通过回顾光谱变化和比色观测,总结了偶氮化合物的合成及其在各种反应性分析物中的显色传感应用的最新进展。本文综述了偶氮染料在不同分析物显色传感中的潜力。我们相信这篇综述将对设计偶氮基显色传感器的研究人员产生兴趣和重要意义。
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引用次数: 0
Organocatalyzed stereoselective glycosylation: an overview of the last decade 有机催化立体选择性糖基化:近十年的综述
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-02-23 DOI: 10.2174/1570193x20666230223144523
C. A. de Parrodi, Mildred López, Gabriela Huelgas, J. D. Lozada-Ramírez
Even though there has been an important evolution in the synthesis of oligosaccharides, the efficient and stereoselective study of glycosidic bonds through non-toxic, moderate, and inexpensive techniques is one of the most challenging fields in organic synthesis. Glycosyl reactions play a fundamental role in biological material and structure-activity relationships, having numerous medicinal chemistry applications. For this, interesting strategies have evolved over the years to control the stereoselectivity of glycosidic bonds, including the manipulation of different reaction elements, mainly promoters or catalysts, but also involving the nature of donors and solvents. This review looks at glycosylation methodologies in the last decade resulting in the specific formation of alpha or beta glycosidic bonds.
尽管低聚糖的合成已经有了重要的发展,但通过无毒、温和和廉价的技术高效和立体选择性地研究糖苷键是有机合成中最具挑战性的领域之一。糖基反应在生物材料和结构-活性关系中起着重要作用,具有许多药物化学应用。为此,多年来已经发展出一些有趣的策略来控制糖苷键的立体选择性,包括操纵不同的反应元素,主要是促进剂或催化剂,但也涉及给体和溶剂的性质。这篇综述着眼于糖基化方法在过去的十年中导致α或β糖苷键的特定形成。
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引用次数: 0
Synthesis and Biological Activities of Heterocyclic Hybrids Containing Piperidine and Pyridine Moieties: Recent Developments 含哌啶和吡啶杂环杂环化合物的合成及其生物活性研究进展
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-02-13 DOI: 10.2174/1570193x20666230213123453
Gangotri Pemawat, A. Bhatnagar, Rama Kanwar Khangarot
Piperidine and pyridine nuclei are essential heterocyclic systems and act as an essential underpinning for agriculture, medicines, industries, etc. The development of novel methods for the synthesis of these exemplary heterocyclic compounds and their respective hybrids, which show a wide range of biological activities, is a very fascinating theme. The derivatives of these pervasive nuclei are used as antibacterial, antimicrobial, antifungal, antimalarial, anticancer, antiproliferative, antihypertensive, antiparasitic, and many other agents. The hybrids of these nuclei have retained a distinct position in medicinal chemistry and are often incorporated in synthetic drug discovery. In this review, we have compiled relevant literature on different derivatives of piperidine and pyridine moieties and their biological activities.
哌啶和吡啶核是重要的杂环系统,是农业、医药、工业等的重要基础。这些具有广泛生物活性的典型杂环化合物及其杂环化合物的新合成方法的发展是一个非常令人着迷的主题。这些普遍存在的核的衍生物被用作抗菌、抗菌素、抗真菌、抗疟疾、抗癌、抗增殖、抗高血压、抗寄生虫和许多其他药物。这些核的杂合体在药物化学中保持了独特的地位,并且经常被纳入合成药物的发现中。本文综述了哌啶和吡啶基团的不同衍生物及其生物活性的相关文献。
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引用次数: 0
A Review of Functional Composite Materials using PSZ-based Silicon-nitride Preceramic Polymer PSZ基氮化硅预陶瓷聚合物功能复合材料研究进展
IF 2.3 4区 化学 Q2 Chemistry Pub Date : 2023-02-02 DOI: 10.2174/1570193x20666230202165158
Jingjing Xue, Lijuan Zhang, Yongzhao Hou, Guangwu Wen, Dong Wang, Ling Li, Jing Wang
The silicon-nitride ceramics gain a lot of interest for applications under severe conditions due to their thermal stability, thermal shock resistance and chemical stability arising from the three-dimensional lattice structure. The silicon-nitride ceramics can be synthesized from silicon-nitride preceramic polymers based on polysilazane (PSZ), as the ability to fabricate ceramic components of specific geometries is difficult to obtain otherwise. This review systematically summarized the applications of PSZ-based silicon-nitride preceramic polymers in the processing of functional materials. A particular focus is made on the relation between the chemical structure of polymer and the properties of the polymer-derived ceramic. The tailored properties as well as characteristics of ceramic are highlighted and the trend of nowadays research for the future evolution of silicon-nitride preceramic polymer was proposed.
氮化硅陶瓷由于其三维晶格结构的热稳定性、抗热震性和化学稳定性而在恶劣条件下得到了广泛的应用。氮化硅陶瓷可以由基于聚硅氮烷(PSZ)的氮化硅预陶瓷聚合物合成,因为制造特定几何形状的陶瓷部件的能力是很难获得的。本文系统地综述了psp基氮化硅预陶瓷聚合物在功能材料加工中的应用。特别关注的是聚合物的化学结构和聚合物衍生陶瓷的性能之间的关系。重点介绍了氮化硅预陶瓷聚合物的特性和特点,并对其未来的发展趋势进行了展望。
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Mini-reviews in Organic Chemistry
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