Pub Date : 2022-04-28DOI: 10.2174/2211544711666220428110348
R. Bartholomew, Thaipparambil Aneeja, G. Anilkumar
Iron-catalyzed C–H amination reactions had turned up as a potent tool in synthetic organic chemistry in recent years. These reactions are eco-friendly, highly catalytic efficient and show good functional group tolerance. The organonitrogen products of the reaction have found wide applications in agricultural chemistry, medicinal chemistry, industrial chemistry and natural product synthesis. This review focuses on the recent progress in iron-catalyzed C–H amination reactions and covers literature from 2019–2021.
{"title":"Recent Trends and Prospects in the Iron-Catalyzed Amination Reactions","authors":"R. Bartholomew, Thaipparambil Aneeja, G. Anilkumar","doi":"10.2174/2211544711666220428110348","DOIUrl":"https://doi.org/10.2174/2211544711666220428110348","url":null,"abstract":"\u0000\u0000Iron-catalyzed C–H amination reactions had turned up as a potent tool in synthetic organic chemistry in recent years. These reactions are eco-friendly, highly catalytic efficient and show good functional group tolerance. The organonitrogen products of the reaction have found wide applications in agricultural chemistry, medicinal chemistry, industrial chemistry and natural product synthesis. This review focuses on the recent progress in iron-catalyzed C–H amination reactions and covers literature from 2019–2021.\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"9 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77883403","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}
Pub Date : 2022-03-28DOI: 10.2174/2211544711666220328130026
Nawal S. Alhajri, Mohammed Albuali
Alumina supported nickel-iron -ruthenium based catalyst with high surface area (200 m2 g-1) was synthesized via an impregnation method and tested for dry reforming of methane. The prepared catalyst was characterized by different analytical techniques, such as X-ray diffraction, X-ray fluorescence, N2 sorption, Environmental scanning electron microscopy and X-ray photoelectron spectroscopy (XPS). The results reveal that the catalyst contains 2.5 wt.% Ni, 2 wt.% Fe and 1.8 wt.% Ru. The catalytic tests showed that the prepared sample exhibits remarkable catalytic activity towards methane dry reforming, with a high conversion of methane and carbon dioxide reached up to 92% and 89% respectively at 800˚C.
{"title":"Alumina Supported Nickel-Iron-Ruthenium based Catalyst for Dry Reforming of Methane","authors":"Nawal S. Alhajri, Mohammed Albuali","doi":"10.2174/2211544711666220328130026","DOIUrl":"https://doi.org/10.2174/2211544711666220328130026","url":null,"abstract":"\u0000\u0000Alumina supported nickel-iron -ruthenium based catalyst with high surface area (200 m2 g-1) was synthesized via an impregnation method and tested for dry reforming of methane.\u0000\u0000\u0000\u0000The prepared catalyst was characterized by different analytical techniques, such as X-ray diffraction, X-ray fluorescence, N2 sorption, Environmental scanning electron microscopy and X-ray photoelectron spectroscopy (XPS).\u0000\u0000\u0000\u0000The results reveal that the catalyst contains 2.5 wt.% Ni, 2 wt.% Fe and 1.8 wt.% Ru.\u0000\u0000\u0000\u0000The catalytic tests showed that the prepared sample exhibits remarkable catalytic activity towards methane dry reforming, with a high conversion of methane and carbon dioxide reached up to 92% and 89% respectively at 800˚C.\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81574912","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}
Pub Date : 2022-02-10DOI: 10.2174/2211544711666220210125547
Biswajit Panda
Smart coupling: Alkyne carboxylic acid derivatives are stable, non-toxic, inexpensive, and commercially available. They are prevalent intermediates for various synthetic transformations. In recent years, decarboxylative oxidative alkynylation reactions involving direct C−H bond activation of diverse carbo- and hetero-cycles with alkyne carboxylic acid have attracted more and more interest from the synthetic community. The joy and challenges of direct oxidative decarboxylative alkynylation have been discussed in detail to enlighten this highly emerging area. More emphasis is being placed on the fascinating implementation and advancement of various methods for the formation of C(SP2)-C(SP) bonds. This short review mainly focuses on developments of the decarboxylative oxidative alkynylation reaction, considering the uniqueness of each protocol by highlighting the substrate scope, selectivity, and yields in conjunction with mechanistic insights.
{"title":"Progress in Catalytic Decarboxylative Oxidative C-H Alkynylation","authors":"Biswajit Panda","doi":"10.2174/2211544711666220210125547","DOIUrl":"https://doi.org/10.2174/2211544711666220210125547","url":null,"abstract":"\u0000\u0000Smart coupling: Alkyne carboxylic acid derivatives are stable, non-toxic, inexpensive, and commercially available. They are prevalent intermediates for various synthetic transformations. In recent years, decarboxylative oxidative alkynylation reactions involving direct C−H bond activation of diverse carbo- and hetero-cycles with alkyne carboxylic acid have attracted more and more interest from the synthetic community. The joy and challenges of direct oxidative decarboxylative alkynylation have been discussed in detail to enlighten this highly emerging area. More emphasis is being placed on the fascinating implementation and advancement of various methods for the formation of C(SP2)-C(SP) bonds. This short review mainly focuses on developments of the decarboxylative oxidative alkynylation reaction, considering the uniqueness of each protocol by highlighting the substrate scope, selectivity, and yields in conjunction with mechanistic insights.\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"11 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91548276","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}
Pub Date : 2021-11-19DOI: 10.2174/2211544710666211119100631
Sharda Pasricha
Bromination is a key reaction in chemical industry, since the organobromines find application in diverse fields like pharmaceuticals, dyes, fire retardants and as intermediates in chemical synthesis. To carry out green, in-situ bromination of acetanilide in aqueous medium using micellar SDS as catalyst. Bromination of acetanilide in-situ using potassium bromide as a non-corrosive source of bromine, ceric ammonium nitrate as oxidant, micellar solution of sodium dodecyl sulphate (SDS) as catalyst and water as solvent. p-Bromoacetanilide was prepared in excellent yields, at room temperature, using green chemistry principles. The presented method provides a fast and environmentally safe route for the preparation of p-bromoacetanilide from acetanilide. It avoids the use of volatile, corrosive, and hazardous substances like liquid bromine and acetic acid. The use of water makes it safer and free from hazardous organic solvents. This reaction can be suitably adopted at the undergraduate level and may find use in the synthesis of commercially important bromo compounds.
{"title":"Aqueous Phase Bromination by Micellar Solution of Sodium Dodecyl Sulfate (SDS): An Undergraduate Chemistry Experiment","authors":"Sharda Pasricha","doi":"10.2174/2211544710666211119100631","DOIUrl":"https://doi.org/10.2174/2211544710666211119100631","url":null,"abstract":"\u0000\u0000Bromination is a key reaction in chemical industry, since the organobromines find application in diverse fields like pharmaceuticals, dyes, fire retardants and as intermediates in chemical synthesis.\u0000\u0000\u0000\u0000\u0000To carry out green, in-situ bromination of acetanilide in aqueous medium using micellar SDS as catalyst.\u0000\u0000\u0000\u0000\u0000Bromination of acetanilide in-situ using potassium bromide as a non-corrosive source of bromine, ceric ammonium nitrate as oxidant, micellar solution of sodium dodecyl sulphate (SDS) as catalyst and water as solvent. \u0000\u0000\u0000\u0000\u0000 p-Bromoacetanilide was prepared in excellent yields, at room temperature, using green chemistry principles.\u0000\u0000\u0000\u0000\u0000 The presented method provides a fast and environmentally safe route for the preparation of p-bromoacetanilide from acetanilide. It avoids the use of volatile, corrosive, and hazardous substances like liquid bromine and acetic acid. The use of water makes it safer and free from hazardous organic solvents. This reaction can be suitably adopted at the undergraduate level and may find use in the synthesis of commercially important bromo compounds.\u0000\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"161 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76420174","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}
Pub Date : 2021-11-19DOI: 10.2174/2211544710666211119094247
Jyoti Dhariwal, Ravina Yadav, Sheetal Yadav, A. Sinha, C. Srivastava, G. K. Rao, M. Srivastava, V. Sharma, Monu Verma, P. Rawat, Kiran Banwar, Varun Rawat
In the present work, the preparation and catalytic activity of spinel ferrite [MFe2O4; M = Fe, Mn, Co, Cu, Ni] nanoparticles to synthesize 5-hydroxymethylfurfural (HMF) have been discussed. Ferrites possess unique physicochemical properties, including excellent magnetic characteristics, high specific surface area, active surface sites, high chemical stability, tunable shape and size, and easy functionalization. These properties make them essential heterogeneous catalysts in many organic reactions. This study aims to synthesize a series of transition metal ferrite nanoparticles and use them in the dehydration of carbohydrates for 5-hydroxymethylfurfural (HMF) synthesis. The ferrite nanoparticles were prepared via the co-precipitation method, and PXRD confirmed their phase stability. The surface area and the crystallite size of the nanoparticles were calculated using BET and PXRD, respectively. The easily prepared heterogeneous nanocatalyst showed a significant catalytic performance, and among all spinel ferrites, CuFe2O4 revealed maximum catalytic ability. Being a heterogeneous catalyst and magnetic in nature, ferrite nanoparticles were easily recovered by using an external magnet and reused up to several runs without substantial loss in catalytic activity. HMF was synthesized from fructose in a good yield of 71%.
{"title":"Magnetic Spinel Ferrite: An Efficient, Reusable Nano Catalyst for HMFSynthesis","authors":"Jyoti Dhariwal, Ravina Yadav, Sheetal Yadav, A. Sinha, C. Srivastava, G. K. Rao, M. Srivastava, V. Sharma, Monu Verma, P. Rawat, Kiran Banwar, Varun Rawat","doi":"10.2174/2211544710666211119094247","DOIUrl":"https://doi.org/10.2174/2211544710666211119094247","url":null,"abstract":"\u0000\u0000In the present work, the preparation and catalytic activity of spinel ferrite\u0000[MFe2O4; M = Fe, Mn, Co, Cu, Ni] nanoparticles to synthesize 5-hydroxymethylfurfural (HMF)\u0000have been discussed.\u0000\u0000\u0000\u0000Ferrites possess unique physicochemical properties, including excellent magnetic\u0000characteristics, high specific surface area, active surface sites, high chemical stability, tunable shape\u0000and size, and easy functionalization. These properties make them essential heterogeneous catalysts\u0000in many organic reactions.\u0000\u0000\u0000\u0000 This study aims to synthesize a series of transition metal ferrite nanoparticles and use\u0000them in the dehydration of carbohydrates for 5-hydroxymethylfurfural (HMF) synthesis.\u0000\u0000\u0000\u0000The ferrite nanoparticles were prepared via the co-precipitation method, and PXRD confirmed their phase stability. The surface area and the crystallite size of the nanoparticles were calculated using BET and PXRD, respectively.\u0000\u0000\u0000\u0000The easily prepared heterogeneous nanocatalyst showed a significant catalytic performance, and among all spinel ferrites, CuFe2O4 revealed maximum catalytic ability.\u0000\u0000\u0000\u0000\u0000Being a heterogeneous catalyst and magnetic in nature, ferrite nanoparticles were easily recovered by using an external magnet and reused up to several runs without substantial loss in\u0000catalytic activity.\u0000\u0000\u0000\u0000HMF was synthesized from fructose in a good yield of 71%.\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82601870","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}
Pub Date : 2021-11-19DOI: 10.2174/2211544710666211119095007
A. Sarkar, S. Pandey
Ionic Liquids (ILs) in their neoteric form have emerged to be a potential ‘green’ alternative of traditional Volatile Organic Compounds (VOCs) as solvents in different fields of industries and academia. Recent investigations on the development of multi-faceted applications of ionic liquids have revealed that they really stand for “environmentally-benign” solvents as far as their impact on the ecology is concerned. This caused them to be an exciting and lucrative subject to explore more and more, and many research groups are involved in the manifestation of their inherent undisclosed legacy. Recently, there has been a huge jump in search of an alternative to conventional metal catalysts in academia as well as in industries due to their pollution-evoking roles. Scientists have explored multiple numbers of homogeneous or heterogeneous mixtures of catalysts incorporating ionic liquids to reduce the extent of contamination in our global environment produced due to catalytic synthesis and chemical transformations. In this review, we have put our concentration on some beneficial and recently explored aspects of the successful implementation of Ionic Liquids in different forms in several fields of catalysis as a ‘green’ alternative catalyst/co-catalyst/solvent for catalysis to replace or minimize the lone and hazardous use of metal and metallic compounds as catalysts as well as chemicals like mineral acids or VOCs as solvents. Here, our study focuses on the inevitable role of ILs in several catalytic reactions like cycloaddition of CO2, electrolytic reduction of CO2, biocatalytic or enzymatic reactions, some of the important organic conversions, and biomass to biofuel conversion as catalysts, cocatalysts, catalyst activator, and solvents.
{"title":"Applications of Ionic Liquids in Green Catalysis: A Review of Recent Efforts","authors":"A. Sarkar, S. Pandey","doi":"10.2174/2211544710666211119095007","DOIUrl":"https://doi.org/10.2174/2211544710666211119095007","url":null,"abstract":"\u0000\u0000Ionic Liquids (ILs) in their neoteric form have emerged to be a potential ‘green’ alternative\u0000of traditional Volatile Organic Compounds (VOCs) as solvents in different fields of industries and academia. Recent investigations on the development of multi-faceted applications of ionic liquids have\u0000revealed that they really stand for “environmentally-benign” solvents as far as their impact on the\u0000ecology is concerned. This caused them to be an exciting and lucrative subject to explore more and\u0000more, and many research groups are involved in the manifestation of their inherent undisclosed legacy.\u0000Recently, there has been a huge jump in search of an alternative to conventional metal catalysts in academia as well as in industries due to their pollution-evoking roles. Scientists have explored multiple\u0000numbers of homogeneous or heterogeneous mixtures of catalysts incorporating ionic liquids to reduce\u0000the extent of contamination in our global environment produced due to catalytic synthesis and chemical transformations. In this review, we have put our concentration on some beneficial and recently explored aspects of the successful implementation of Ionic Liquids in different forms in several fields of\u0000catalysis as a ‘green’ alternative catalyst/co-catalyst/solvent for catalysis to replace or minimize the\u0000lone and hazardous use of metal and metallic compounds as catalysts as well as chemicals like mineral\u0000acids or VOCs as solvents. Here, our study focuses on the inevitable role of ILs in several catalytic reactions like cycloaddition of CO2, electrolytic reduction of CO2, biocatalytic or enzymatic reactions,\u0000some of the important organic conversions, and biomass to biofuel conversion as catalysts, cocatalysts, catalyst activator, and solvents.\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81066749","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}
Pub Date : 2021-11-08DOI: 10.2174/2211544710666211108095557
Kiran Avinash, K. Rohit, G. Anilkumar
Hydrosilylation is an important transformation in organic synthesis. It has displayed widespread applications in homogenous catalysis and in the commercial production of organosilanes and organosilicon compounds. Though metals like Ru, Rh etc were used widely for achieving hydrosilylation, the increasing environmental concerns and the search for less expensive alternatives resulted in the investigation of transition metals. Metals like Ni, Co etc exhibit potential cost benefits, in addition to their low CO2 foot print and lower toxicity. Thus, transition metal catalysis has emerged as a promising strategy for hydrosilylation. This comprehensive review discusses the catalytic hydrosilylation of various functional groups with non-noble transition metals such as iron, cobalt and nickel in the last decade. Here, the topic is categorized based on the substrate functional groups such as aldehydes, ketones, alkenes, etc.
{"title":"Iron, Cobalt and Nickel Catalyzed Hydrosilylative Reduction of Functional Groups","authors":"Kiran Avinash, K. Rohit, G. Anilkumar","doi":"10.2174/2211544710666211108095557","DOIUrl":"https://doi.org/10.2174/2211544710666211108095557","url":null,"abstract":"\u0000\u0000Hydrosilylation is an important transformation in organic synthesis. It has displayed widespread applications in homogenous catalysis and in the commercial production of organosilanes and organosilicon compounds. Though metals like Ru, Rh etc were used widely for achieving hydrosilylation, the increasing environmental concerns and the search for less expensive alternatives resulted in the investigation of transition metals. Metals like Ni, Co etc exhibit potential cost benefits, in addition to their low CO2 foot print and lower toxicity. Thus, transition metal catalysis has emerged as a promising strategy for hydrosilylation. This comprehensive review discusses the catalytic hydrosilylation of various functional groups with non-noble transition metals such as iron, cobalt and nickel in the last decade. Here, the topic is categorized based on the substrate functional groups such as aldehydes, ketones, alkenes, etc.\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74107585","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}
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