Current Organocatalysis最新文献_第6页

Kinetic and Mechanistic Study of oxidative Degradation And Detoxification of Fast Yellow Azo Dye Using Surfactant Assisted Ir-Ni Bimetallic Nanocatalyst 表面活性剂辅助Ir-Ni双金属纳米催化剂氧化降解脱毒快黄偶氮染料的动力学及机理研究

IF 1.1

Current Organocatalysis Pub Date : 2022-04-07 DOI: 10.2174/2213337209666220407113453

A. Goel, Shikha

{"title":"Kinetic and Mechanistic Study of oxidative Degradation And Detoxification of Fast Yellow Azo Dye Using Surfactant Assisted Ir-Ni Bimetallic Nanocatalyst","authors":"A. Goel, Shikha","doi":"10.2174/2213337209666220407113453","DOIUrl":"https://doi.org/10.2174/2213337209666220407113453","url":null,"abstract":"\u0000\u0000Catalytic degradation of azo dye.\u0000\u0000\u0000\u0000Azo dyes are toxic agents and pollutants and the degradation of these dyes has an important application in the treatment of textile industry wastes. Catalytic decolorization of fast yellow dye by hexacyanoferrate (III), abbreviated as HCF(III) using polyvinylpyrrolidone abbreviated as PVP stabilized Ir-Ni bimetallic nanocrystals has been evaluated by kinetic spectrophotometric method at 440nm wavelength of the reaction mixture.\u0000\u0000\u0000\u0000The impact of various operational factors such as fast yellow dye abbreviated as [FY], oxidant [HCF(III)] ions, promoter iridium-nickel bimetallic nanoparticles abbreviated as [(Ir-Ni)] BMNPs, and solution pH on the rate of the reaction have been examined.\u0000\u0000\u0000\u0000The results represent that the reaction follows first -order kinetics model with respect to [oxidant] at optimum pH 8 and fix temperature 40±0.1◦C. Thermodynamic parameters such as activation energy (Ea), enthalpy (ΔH#), entropy (ΔS#), frequency factor (A), and free energy of activation (ΔF#) have been evaluated by examining the reaction rate at four temperatures i.e. 40⁰C, 45⁰C, 50⁰C, and 55⁰C. On the basis of experimental outcomes, an appropriate mechanism involving complex formation has been proposed.\u0000\u0000\u0000\u0000Analytical techniques such as UV-Vis spectroscopy, FTIR, and LCMS of degraded products represent the formation of easier and less harmful compounds.\u0000","PeriodicalId":10945,"journal":{"name":"Current Organocatalysis","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48808238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Oxadiazole, Imidazole, Benzimidazole, Cyclohexano Analogues of 1, 5-benzodiazepines through phenoxyl/phenylamino linkage 苯氧基/苯胺连锁法合成邻二唑、咪唑、苯并咪唑、1,5 -苯二氮卓类环己基类似物

IF 1.1

Current Organocatalysis Pub Date : 2022-04-04 DOI: 10.2174/2212796816666220404151254

M. Mir

{"title":"Synthesis of Oxadiazole, Imidazole, Benzimidazole, Cyclohexano Analogues of 1, 5-benzodiazepines through phenoxyl/phenylamino linkage","authors":"M. Mir","doi":"10.2174/2212796816666220404151254","DOIUrl":"https://doi.org/10.2174/2212796816666220404151254","url":null,"abstract":"\u0000\u0000To synthesize Oxadiazole, Imidazole, Benzimidazole, and Cyclohexano Analogues of 1, 5-benzodiazepines through phenoxyl/phenylamino linkage\u0000\u0000\u0000\u0000It is worthwhile to mention that Imidazoles, benzimidazoles, oxadiazoles, are analysed extensively mainly as per their ready availability, broad chemical reactivity, and wide spectrum of biochemical activities, like antimicrobial, anti-inflammatory, antitumor, anticonvulsant drugs, anti-tubercular medicines, and having anti-HIV effect etc.\u0000\u0000\u0000\u0000The Oxadiazole, Imidazole, Benzimidazole derivatives were synthesized via Cyclohexano Analogues of 1, 5-benzodiazepines through phenoxyl/phenylamino linkage.\u0000\u0000\u0000\u0000The characteristic drift of our interest towards these molecules prompted us to think about the structural modification of [1, 5]-benzodiazepine compound by incorporating on its 2-position imidazole, benzimidazole, oxadiazole, nuclei through an aminophenyl or phenoxyl bridge to synthesize these novel heterocyclic analogues of 1, 5-benzodiazepines.\u0000\u0000\u0000\u0000These derivatives have been analysed by various spectrophometric techniques like UV, IR, NMR, and MS. The synthesis of these compounds via the mentioned methods are unique as Cyclohexano Analogues of 1, 5-benzodiazepines through phenoxyl/phenylamino is a totally new way of synthesis. The derivatives can be analysed for various properties in chemistry and pharmacology, as their parent compounds has many pharmacological properties.\u0000\u0000\u0000\u0000The synthesis of these types of compounds does provide a new hope to medicinal and pharmaceutical industries. Therefore further efforts should be taken into consideration for their synthesis and analysis of their medicinal properties.\u0000","PeriodicalId":10945,"journal":{"name":"Current Organocatalysis","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42814058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetics and mechanism of reduction of hexacholoroiridate (IV) by carcinogenic nicotine as alkaloid in aqueous solutions with determination of ionization constant of nicotine 水溶液中致癌生物碱烟碱还原六氯铱酸盐（IV）的动力学和机理及烟碱电离常数的测定

IF 1.1

Current Organocatalysis Pub Date : 2022-03-29 DOI: 10.2174/2213337209666220329141541

R. Hassan, S. Ibrahim

{"title":"Kinetics and mechanism of reduction of hexacholoroiridate (IV) by carcinogenic nicotine as alkaloid in aqueous solutions with determination of ionization constant of nicotine","authors":"R. Hassan, S. Ibrahim","doi":"10.2174/2213337209666220329141541","DOIUrl":"https://doi.org/10.2174/2213337209666220329141541","url":null,"abstract":"\u0000\u0000Nicotine (NIC) is a lipid soluble alkaloid found predominately in tobacco and tobacco products including cigarettes, cigars and oral tobacco products such as snuff and chewing tobacco. Since nicotine substrate is the major constituent of tobacco smoke, it may cause negatively impacted problems to the human healthcare which keeps many users hooked.\u0000\u0000\u0000\u0000A spectrophotometric technique has been applied for investigating the kinetics of reduction of hexachloroiridiate (IV) as inert one-equivalent oxidant by carcinogenic nicotine (NIC) in aqueous perchlorate solutions.\u0000\u0000\u0000\u0000First-order in [IrCl6]2- and fractional-first-order with respect to the nicotine concentration has been revealed. Kinetic evidence for formation of 1: 1 intermediate complex between the NIC and [IrCl6]2- prior to the rate-determining step was confirmed.\u0000\u0000\u0000\u0000The ionization constants of nicotine was evaluated from the kinetic data and has been found to be 8.57x10-4 and 4.57 x 10-4 moldm-3 at ionic strength of 0.5 moldm-3 and at 30˚C and 40˚C, respectively. The activation parameters have been deduced from the kinetic results of the temperature-dependence of rate constants and a plausible reaction mechanism of the redox reaction is suggested and discussed. Nicotinic acid (Vitamin B3) was formed as oxidation product of nicotine oxidation.\u0000","PeriodicalId":10945,"journal":{"name":"Current Organocatalysis","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47733748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Magnetically Recyclable Ag@Fe2O3 Core-shell Nanostructured Catalyst for One-pot Synthesis of 2-Aryl Benzimidazole and Benzothiazole 磁性可回收Ag@Fe2O3一锅合成2-芳基苯并咪唑和苯并噻唑的核壳纳米结构催化剂

IF 1.1

Current Organocatalysis Pub Date : 2022-03-29 DOI: 10.2174/2213337209666220329125047

Gayatree Shinde, Jyotsna Thakur

{"title":"Magnetically Recyclable Ag@Fe2O3 Core-shell Nanostructured Catalyst for One-pot Synthesis of 2-Aryl Benzimidazole and Benzothiazole","authors":"Gayatree Shinde, Jyotsna Thakur","doi":"10.2174/2213337209666220329125047","DOIUrl":"https://doi.org/10.2174/2213337209666220329125047","url":null,"abstract":"\u0000\u0000Nanocatalysts exhibit several applications in the synthesis of many industrially important organic compounds. They manifest extremely fascinating physical and chemical properties which can be exploited in their catalytic applications.\u0000\u0000\u0000\u0000A magnetically recyclable Ag@Fe2O3 core-shell structured nanocatalyst was synthesized by a simple sol-gel technique and characterized by x-ray diffraction spectroscopy, field emission scanning electron microscope, high-resolution transmission electron microscopy, fourier transform infrared spectroscopy, vibrating sample magnetometer etc. Nanocatalyst was found to be a highly efficient heterogeneous catalyst for the synthesis of 2-aryl benzimidazoles and benzothiazoles via one-pot condensation of aromatic aldehydes and 1, 2-phenylenediamine, and 2-aminothiophenol.\u0000\u0000\u0000\u0000Ag@Fe2O3 nanocatalyst provides rapid conversion of the substrate into the desired product at room temperature within just 5-18 min in the presence of C2H5OH with good to excellent yield. The combination of Ag core with magnetic Fe2O3 shell results in improved efficiency, stability, magnetic recovery, and reusability compare to the individual nanoparticles.\u0000\u0000\u0000\u0000The synthetic protocol is featured with high yield, mild conditions, and simple work-up. Magnetic recovery of the catalyst from reaction systems and its reusability for several runs without loss of catalytic activity are additional advantages.\u0000","PeriodicalId":10945,"journal":{"name":"Current Organocatalysis","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46429658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Succinimide based reagents: Useful catalysts for important organic reactions 琥珀酰亚胺基试剂：用于重要有机反应的有用催化剂

IF 1.1

Current Organocatalysis Pub Date : 2022-03-22 DOI: 10.2174/2213337209666220322115802

M. Abedini, Reyhaneh Pourhasan Kisomi, F. Shirini

引用次数: 0

Condensation Reactions of Aromatic Aldehydes with Active Methylene Compounds: The Beneficial Sinergy of Alkaline Ionic Liquid in One Pot Synthesis 芳香醛与活性亚甲基化合物的缩合反应：碱性离子液体一锅法合成的有利条件

IF 1.1

Current Organocatalysis Pub Date : 2022-03-01 DOI: 10.2174/2213337209666220301123926

Swapnil R. Bankar

{"title":"Condensation Reactions of Aromatic Aldehydes with Active Methylene Compounds: The Beneficial Sinergy of Alkaline Ionic Liquid in One Pot Synthesis","authors":"Swapnil R. Bankar","doi":"10.2174/2213337209666220301123926","DOIUrl":"https://doi.org/10.2174/2213337209666220301123926","url":null,"abstract":"\u0000\u0000In recent times, there is an on-going interest in developing convenient and environmentally friendly synthetic methods in organic chemistry. The use of ionic liquid catalysts in organic synthesis is a developing area that allows reactions to be run at low temperature and without solvents. Literature overview revealed that room temperature supported ionic liquid catalysis is a developing field in catalytic science with huge application in organic synthesis. Hence in this current article our focus is on the one-pot synthesis of arylidene derivatives with the use of ([bmim]OH) ionic liquid.\u0000\u0000\u0000\u0000We describe here the use of an ionic liquid catalyst, 1-n-butyl-3-methylimidazolium hydroxide, [bmim]OH), in the convenient one pot synthesis of arylidene derivatives by the reaction of the active methylene compound, malononitrile, with pyrazole aromatic aldehydes under microwave irradiation.\u0000\u0000\u0000\u0000The functionalized ionic liquid, 1-n-butyl-3-methylimidazolium hydroxide ([bmim]OH) catalyzed Knoevenagel condensation reactions of pyrazole aromatic aldehydes with active methylene compound malononitrile carried out under microwave irradiation. The reaction progress was monitored by thin layer chromatography and the synthesized compounds were further characterized by NMR spectroscopy.\u0000\u0000\u0000\u0000This proposed work demonstrate the utility of the use of the ionic liquid catalyst [bmim]OH, in the suitable, high yield (80-95%) microwave assisted reactions of pyrazole aromatic aldehydes with the active methylene compound malononitrile.\u0000\u0000\u0000\u0000An eco-friendly synthesis of pyrazole derivatives has been demonstrated using ([bmim]OH) ionic liquid as a catalyst for the Knoevenagel condensation reactions of pyrazole aromatic aldehydes and malononitrile with microwave irradiation. The advantages of this green method are its convenience, mild reaction conditions, and high product yields (80-95%).\u0000","PeriodicalId":10945,"journal":{"name":"Current Organocatalysis","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47610331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly efficient, reusable functionalized pyridinium salts as a catalyst for the simple and cost-effective preparation of tetrahydro[b]benzopyran derivatives 高效、可重复使用的官能化吡啶鎓盐作为催化剂，用于简单且经济高效地制备四氢[b]苯并吡喃衍生物

IF 1.1

Current Organocatalysis Pub Date : 2022-02-17 DOI: 10.2174/2213337209666220217112937

Saida Benzerka, M. Redouane, Naima Khiri-Meribout, A. Debache

引用次数: 0

Editorial 编辑

IF 1.1

Current Organocatalysis Pub Date : 2022-02-01 DOI: 10.2174/221333720901220328164523

Aparna Das, B. Banik

引用次数: 0

Meet the Editorial Board Member 会见编辑委员会成员

IF 1.1

Current Organocatalysis Pub Date : 2022-02-01 DOI: 10.2174/221333720901220328154727

Bubun Banerjee

引用次数: 0

Microwave-assisted, [Bmim]HSO4-catalyzed the Friedländer quinoline synthesis of quinoline under solvent-free conditions 微波辅助下，[Bmim] hso4在无溶剂条件下催化Friedländer喹啉合成

IF 1.1

Current Organocatalysis Pub Date : 2022-01-27 DOI: 10.2174/2213337209666220127142333

D. Duc, V. C. Dung

引用次数: 0