The development of the three-component catalytic system for constructing isoindolinones from simple feedstocks is both significant and challenging.In this study,a unique tartrate-linked dimeric samarium-antimonotungst...The development of the three-component catalytic system for constructing isoindolinones from simple feedstocks is both significant and challenging.In this study,a unique tartrate-linked dimeric samarium-antimonotungstate[Sm2(H2O)6(tar)(Sb2W21O72)]220-(Sm4tar2,H4tar=tartaric acid)was synthesized via a one-step method at room temperature using an acetate buffer solution.The dimeric polyanion of Sm4tar2shows a centrosymmetric structure with a parallelogram-like arrangement and comprises two enantiomeric{Sm2(H2O)6(Sb2W21O72)}moieties connected by two enantiomeric tar ligands.Sm4tar2demonstrates efficient catalytic activity in the three-component reaction involving 2-acylbenzoic acids,primary amines,and phosphine oxides to form 3,3-disubstituted isoindolinones.The advantages of this catalytic system include simple feedstocks,green and reusable catalyst,and operational simplicity with water as the sole by-product.This finding enables an effective molecular fragment assembly strategy for synthesizing isoindolinone drug precursor skeletons.展开更多
A facile and environmentally friendly visible-light-induced three-component reaction of α-diazoesters,cyclic ethers and Na SCN to construct organic thiocyanates has been developed at room temperature. This reaction c...A facile and environmentally friendly visible-light-induced three-component reaction of α-diazoesters,cyclic ethers and Na SCN to construct organic thiocyanates has been developed at room temperature. This reaction could occur under photocatalyst-and additive-free conditions to afford a number of organic thiocyanates with moderate to good yield and favorable functional group tolerance.展开更多
A facile and metal-free visible-light-enabled three-component reaction of quinoxalin-2(1 H)-ones,alkenes and CF3SO2Na has been developed under air at room temperature.This photocatalytic tandem reaction using 4 ...A facile and metal-free visible-light-enabled three-component reaction of quinoxalin-2(1 H)-ones,alkenes and CF3SO2Na has been developed under air at room temperature.This photocatalytic tandem reaction using 4 CzIPN as the photocatalyst and air as the green oxidant,provides a mild and environmentally friendly approach to access a series of 3-trifluoroalkylated quinoxalin-2(1 H)-ones.展开更多
The functionalized spiro[indoline-3,40-pyrano[3,2-h]quinolines] were efficiently prepared in high yields from three-component reaction of 8-hydroxyquinoline, isatins and malononitrile or ethyl cyanoacetate in ethanol ...The functionalized spiro[indoline-3,40-pyrano[3,2-h]quinolines] were efficiently prepared in high yields from three-component reaction of 8-hydroxyquinoline, isatins and malononitrile or ethyl cyanoacetate in ethanol at room temperature for about 12 h in the presence of piperidine.展开更多
A green Passerini three-component reaction of 2-(4-oxo-4,5,6,7-tetrahydro-1H-indol-1-yl)acetic acid with alkyl or aryl isocyanides and aldehydes was reported under aqueous conditions at 35 ℃ for 1 h, and21 indolone...A green Passerini three-component reaction of 2-(4-oxo-4,5,6,7-tetrahydro-1H-indol-1-yl)acetic acid with alkyl or aryl isocyanides and aldehydes was reported under aqueous conditions at 35 ℃ for 1 h, and21 indolone-N-amino acid derivatives were prepared in high yields of 42%–99%. Their structures were characterized by IR, ESI–MS, NMR and elemental analysis, and the possible mechanisms have been also proposed. The highly efficient and eco-friendly method provides a facile access to a library of indoloneN-amino acid derivatives for future research on bioactivity screening.展开更多
Potassium tert-butoxide has been found to be a highly efficient catalyst for one-pot,three-component reaction of aryl aldehydes, acetophenones,and thiols via Claisen-Schmidt/Michael addition reactions for the synthesi...Potassium tert-butoxide has been found to be a highly efficient catalyst for one-pot,three-component reaction of aryl aldehydes, acetophenones,and thiols via Claisen-Schmidt/Michael addition reactions for the synthesis of thia-Michael adducts in high yields. The reactions are best carried out in tert-butyl alcohol at room temperature.展开更多
Three-component reaction of arylsulfonamides,dialkyl acetylenedicarboxylates,and ethyl chlorooxoacetate promoted by triphenylphosphine and triethylamine provides a sufficient route for the synthesis of dialkyl N-(ary...Three-component reaction of arylsulfonamides,dialkyl acetylenedicarboxylates,and ethyl chlorooxoacetate promoted by triphenylphosphine and triethylamine provides a sufficient route for the synthesis of dialkyl N-(arylsulfonyl)-4-ethoxy-5-oxo-2,5-dihydro -1H-pyrolle-2,3-dicarboxylates in good yields.展开更多
A highly efficient three-component reaction has been developed for the synthesis of thiazolidinones involving the reaction of 2-amino-l-phenylethanone hydrochloride with an aromatic aldehyde and mercaptoacetic acid in...A highly efficient three-component reaction has been developed for the synthesis of thiazolidinones involving the reaction of 2-amino-l-phenylethanone hydrochloride with an aromatic aldehyde and mercaptoacetic acid in the presence of diisopropylethylamine in a single pot.Critically,this reaction exhibited excellent chemoselectivity,with the nitrogen atom of the 2-amino-l-phenylethanone component reacting selectively with the aromatic aldehyde to give the corresponding Schiff base.Nucleophilic attack at the carbon of the Schiff base by the sulfur atom of mercaptoacetic,followed by a cyclocondensation reaction between the nitrogen and the carboxylic acid moiety afforded the desired thiazolidinones,which were fully characterized by spectroscopic techniques.展开更多
A new method was developed to diastereoselectively synthesize polysubstituted 1,2‐diamine compounds from the reaction of diazoesters with arylamines and diaryl imines by using the dioxazoline ligand L2‐ligated silve...A new method was developed to diastereoselectively synthesize polysubstituted 1,2‐diamine compounds from the reaction of diazoesters with arylamines and diaryl imines by using the dioxazoline ligand L2‐ligated silver catalyst.The Lewis acidity of the silver catalyst affected the different types of substrate diastereoselectivities;It also led to the formation of amine‐exchange side products.展开更多
A simple and metal-free method has been developed for the construction of quinoline-2,4-carboxylates under mild conditions via a molecular iodine-catalyzed three-component tandem reaction of arylamines, ethyl glyoxyla...A simple and metal-free method has been developed for the construction of quinoline-2,4-carboxylates under mild conditions via a molecular iodine-catalyzed three-component tandem reaction of arylamines, ethyl glyoxylate, and a-ketoesters. The present protocol provides a convenient and attractive approach to various quinoline-2,4-carboxylates in moderate to good yields with excellent functional group tolerance.展开更多
A gold(Ⅰ)-catalyzed three-component reaction of β-nitrostyrenes with 1,3-dicarbonyl compounds and primary amines to form polysubstituted pyrroles has been developed at room temperature in ethanol.The key advantages ...A gold(Ⅰ)-catalyzed three-component reaction of β-nitrostyrenes with 1,3-dicarbonyl compounds and primary amines to form polysubstituted pyrroles has been developed at room temperature in ethanol.The key advantages of the three-component reaction are the mild reaction conditions and environmentally safer solvent.展开更多
An efficient and practical electrochemical method for the three-component reaction cascade Mumm rearrangement of imides has been developed using a simple undivided cell with carbon electrodes at room temperature,which...An efficient and practical electrochemical method for the three-component reaction cascade Mumm rearrangement of imides has been developed using a simple undivided cell with carbon electrodes at room temperature,which provides a useful strategy for the rapid synthesis of sulfur-containing imides with broad substrate scope and high functional tolerance.It is a rare example of in situ generation of O-acyl isoamide precursor for Mumm rearrangement.展开更多
The three-component reaction of triphenylphosphine,dialkyl but-2-ynedioate and arylidene pivaloylacetonitrile in dry methylene dichloride at room temperature resulted in unexpected densely substituted 1-(triphenyl-λ...The three-component reaction of triphenylphosphine,dialkyl but-2-ynedioate and arylidene pivaloylacetonitrile in dry methylene dichloride at room temperature resulted in unexpected densely substituted 1-(triphenyl-λ^5-phosphanylidene)ethyl)-2,3-dihydrofurans in satisfactory yields with high diastereoselectivity.The relative configuration of the 2,3-dihydrofurans was elucidated by determination of single crystal structures.展开更多
In this work, an efficient copper-catalyzed three-component reaction for the synthesis of sulfenylimidazo [1,2-a]pyridines using elemental sulfur as the sulfenylating agents has been developed. The reaction could proc...In this work, an efficient copper-catalyzed three-component reaction for the synthesis of sulfenylimidazo [1,2-a]pyridines using elemental sulfur as the sulfenylating agents has been developed. The reaction could proceed smoothly with a high degree of functional group tolerance and provide the desired products in moderate to good yield.展开更多
The three-component reaction of aromatic aldehyde,malononitrile and aliphatic amine in a mixed solvent of methanol and water exhibited very interesting molecular diversity and gave the derivatives of polysubstituted N...The three-component reaction of aromatic aldehyde,malononitrile and aliphatic amine in a mixed solvent of methanol and water exhibited very interesting molecular diversity and gave the derivatives of polysubstituted N-methyldihydropyridines,2-dialkylaminopyridines and 2-methoxypyridines as main products according to the structure of aliphatic amines used.展开更多
Waterjet propulsion systems,as the predominant form of propulsion for high-performance vessels,are widely employed in military ships across various navies.However,when operating in shallow water conditions,underwater ...Waterjet propulsion systems,as the predominant form of propulsion for high-performance vessels,are widely employed in military ships across various navies.However,when operating in shallow water conditions,underwater suction vortices(USVs)are prone to form near the pump inlet.These vortices can markedly degrade the hydraulic performance of the waterjet propulsion system by reducing efficiency and potentially inducing cavitation and associated vibrations.The formation and evolution of USVs occur underwater,rendering them highly elusive and difficult to detect or measure accurately.As a result,investigating the underlying mechanisms of USV generation and developing effective control strategies remain substantial challenges in the field.To achieve precise identification and capture of USVs,volumetric three component velocimetry technology was employed to conduct high-precision analyses of the three-dimensional spatiotemporal evolution signals and vortex dynamic characteristics of USVs throughout their entire lifecycle.The findings demonstrate that the typical evolution of USVs can be categorized into five stages:precursor,inception,development,weakening,and dissipation.During their evolution,both velocity and vorticity within USVs initially increase before subsequently decreasing.Notably,the velocity distribution within the vortex core conforms to the Rankine composite vortex model.The adverse pressure gradient at the riverbed,combined with the suction flow of the pump,directly facilitates USV generation.These findings provide a critical foundation for USV identification,offering a valuable method for flow-field testing in vortex and other fault identification,while overcoming the limitations of conventional point sensors in complex flow diagnostics.展开更多
A sequential one-pot two-step reaction for efficient synthesis of pyrrolo[2,1-a]isoquinoline and pyrrolo[1,2-a]- quinoline derivatives in good yields has been successfully developed. The reaction included firstly Cu-c...A sequential one-pot two-step reaction for efficient synthesis of pyrrolo[2,1-a]isoquinoline and pyrrolo[1,2-a]- quinoline derivatives in good yields has been successfully developed. The reaction included firstly Cu-catalyzed three-component reaction of isoquinoline (quinoline), acetylenedicarboxylate and alkynylbenzene and then Pd-catalyzed intramolecular C(sp)-C(sp^2) coupling reaction of initially formed 1-alkenyl-2-alkynyl- 1,2-dihydroiso- quinoline (1,2-dihydroquinoline).展开更多
A strategy for the synthesis of benzisothiazoles by a three-component reaction was developed using elemental sulfur and ammonium as heteroatom components under transition metal-free conditions.The reaction is preferab...A strategy for the synthesis of benzisothiazoles by a three-component reaction was developed using elemental sulfur and ammonium as heteroatom components under transition metal-free conditions.The reaction is preferably based on pyridine or quinoline ring substrate,and good to excellent yields can be obtained.Notably,this reaction has been applied to the gram-scale synthesis of bioactive molecules.展开更多
A H4SiW12O40-catalyzed three-component tandem reaction of 2-acylbenzoic acids,primary amines and phosphine oxides to form 3,3-disubstituted isoindolinones was developed.By employing A H4SiW12O40as th...A H4SiW12O40-catalyzed three-component tandem reaction of 2-acylbenzoic acids,primary amines and phosphine oxides to form 3,3-disubstituted isoindolinones was developed.By employing A H4SiW12O40as the catalyst and dimethyl carbonate(DMC)as the solvent,a diverse range of 2-acylbenzoic acid derivatives and primary amines worked well to give the C3-phosphinoyl-functionalized 3,3-disubstituted isoindolinones with the yield range of 61%-87%.Advantages of this transformation include green catalyst and solvent,available starting materials,broad substrate scope,high efficiency and operational simplicity with water as the sole by-product.The strategy achieved an efficient and green molecular fragment assembly to access isoindolinones,which would provide opportunities for the synthesis of potential biologically active molecules in a green manner.展开更多
A novel photocatalytic energy transfer-driven radical relay strategy has been introduced for the chemoand regioselective 1,4-difunctionalization of carbon-sulfur double bonds.This represents the first instance of radi...A novel photocatalytic energy transfer-driven radical relay strategy has been introduced for the chemoand regioselective 1,4-difunctionalization of carbon-sulfur double bonds.This represents the first instance of radical-mediated dual-functionalization of X-Y type unsaturated bonds,enabling the synthesis of complex linear molecules with C–O,C–N,and C-S bonds in a single operation.The method surpasses traditional approaches by avoiding the need for thiourea intermediates and the harsh conditions typically associated with them.The developed strategy exemplifies versatility,being applicable to 1,4-oxyamination,1,4-diamination,and 1,4-sulfonamination reactions,and has demonstrated compatibility with over 60 different substrates.The research also elucidates the role of electronic complementarity between radicals and receptors in achieving high selectivity in 1,4-difunctionalization reactions.This study significantly advances the field of bifunctionalization and remote difunctionalization reactions,with profound implications for the development of pharmaceuticals and materials science.展开更多
基金financially supported by the National Natural Science Foundation of China(No.22301033)Jiangxi Provincial Natural Science Foundation(No.20232ACB213005 and 20212BAB213001)。
摘要The development of the three-component catalytic system for constructing isoindolinones from simple feedstocks is both significant and challenging.In this study,a unique tartrate-linked dimeric samarium-antimonotungstate[Sm2(H2O)6(tar)(Sb2W21O72)]220-(Sm4tar2,H4tar=tartaric acid)was synthesized via a one-step method at room temperature using an acetate buffer solution.The dimeric polyanion of Sm4tar2shows a centrosymmetric structure with a parallelogram-like arrangement and comprises two enantiomeric{Sm2(H2O)6(Sb2W21O72)}moieties connected by two enantiomeric tar ligands.Sm4tar2demonstrates efficient catalytic activity in the three-component reaction involving 2-acylbenzoic acids,primary amines,and phosphine oxides to form 3,3-disubstituted isoindolinones.The advantages of this catalytic system include simple feedstocks,green and reusable catalyst,and operational simplicity with water as the sole by-product.This finding enables an effective molecular fragment assembly strategy for synthesizing isoindolinone drug precursor skeletons.
基金supported by the program of Science and Technology International Cooperation Project of Qinghai Province (No. 2022-HZ-813)the Youth Innovation and Technology Project of High School in Shandong Province (No. 2019KJC021)+1 种基金the Natural Science Foundation of Shandong Province (No. ZR2021MB065)the National Natural Science Foundation of China (No. 31900298)。
摘要A facile and environmentally friendly visible-light-induced three-component reaction of α-diazoesters,cyclic ethers and Na SCN to construct organic thiocyanates has been developed at room temperature. This reaction could occur under photocatalyst-and additive-free conditions to afford a number of organic thiocyanates with moderate to good yield and favorable functional group tolerance.
基金supported by Youth Innovation and Technology Project of Shandong Province(No.2019KJC021)the International Cooperation Project of Qinghai Province(No.2018-HZ-815)+2 种基金the Natural Science Foundation of Shandong Province(No.ZR2018MB009)the Qinghai key laboratory of Tibetan medicine research(No.2017-ZJ-Y11)CAS“Light of West China”Program 2018。
摘要A facile and metal-free visible-light-enabled three-component reaction of quinoxalin-2(1 H)-ones,alkenes and CF3SO2Na has been developed under air at room temperature.This photocatalytic tandem reaction using 4 CzIPN as the photocatalyst and air as the green oxidant,provides a mild and environmentally friendly approach to access a series of 3-trifluoroalkylated quinoxalin-2(1 H)-ones.
基金supported by the National Natural Science Foundation of China (Nos. 21172189, 21572196)the Priority Academic Program Development of Jiangsu Higher Education Institutions
摘要The functionalized spiro[indoline-3,40-pyrano[3,2-h]quinolines] were efficiently prepared in high yields from three-component reaction of 8-hydroxyquinoline, isatins and malononitrile or ethyl cyanoacetate in ethanol at room temperature for about 12 h in the presence of piperidine.
基金the financial support by the Natural Science Foundation of China(No.21272136)Scientific Foundation from graduate school(2015PY089)Youth Talent Development Foundation of China Three Gorges University
摘要A green Passerini three-component reaction of 2-(4-oxo-4,5,6,7-tetrahydro-1H-indol-1-yl)acetic acid with alkyl or aryl isocyanides and aldehydes was reported under aqueous conditions at 35 ℃ for 1 h, and21 indolone-N-amino acid derivatives were prepared in high yields of 42%–99%. Their structures were characterized by IR, ESI–MS, NMR and elemental analysis, and the possible mechanisms have been also proposed. The highly efficient and eco-friendly method provides a facile access to a library of indoloneN-amino acid derivatives for future research on bioactivity screening.
摘要Potassium tert-butoxide has been found to be a highly efficient catalyst for one-pot,three-component reaction of aryl aldehydes, acetophenones,and thiols via Claisen-Schmidt/Michael addition reactions for the synthesis of thia-Michael adducts in high yields. The reactions are best carried out in tert-butyl alcohol at room temperature.
基金the financial support from the Research Council of Islamic Azad University,Mahshahr Branch
摘要Three-component reaction of arylsulfonamides,dialkyl acetylenedicarboxylates,and ethyl chlorooxoacetate promoted by triphenylphosphine and triethylamine provides a sufficient route for the synthesis of dialkyl N-(arylsulfonyl)-4-ethoxy-5-oxo-2,5-dihydro -1H-pyrolle-2,3-dicarboxylates in good yields.
基金supported by Special Assistance Programme SAP,University Grants Commission,New Delhi,India
摘要A highly efficient three-component reaction has been developed for the synthesis of thiazolidinones involving the reaction of 2-amino-l-phenylethanone hydrochloride with an aromatic aldehyde and mercaptoacetic acid in the presence of diisopropylethylamine in a single pot.Critically,this reaction exhibited excellent chemoselectivity,with the nitrogen atom of the 2-amino-l-phenylethanone component reacting selectively with the aromatic aldehyde to give the corresponding Schiff base.Nucleophilic attack at the carbon of the Schiff base by the sulfur atom of mercaptoacetic,followed by a cyclocondensation reaction between the nitrogen and the carboxylic acid moiety afforded the desired thiazolidinones,which were fully characterized by spectroscopic techniques.
基金the National Natural Science Foundation of China(21472237)~~
摘要A new method was developed to diastereoselectively synthesize polysubstituted 1,2‐diamine compounds from the reaction of diazoesters with arylamines and diaryl imines by using the dioxazoline ligand L2‐ligated silver catalyst.The Lewis acidity of the silver catalyst affected the different types of substrate diastereoselectivities;It also led to the formation of amine‐exchange side products.
基金supported by the Opening Project of Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region (No. 2014YSHXZD01)
摘要A simple and metal-free method has been developed for the construction of quinoline-2,4-carboxylates under mild conditions via a molecular iodine-catalyzed three-component tandem reaction of arylamines, ethyl glyoxylate, and a-ketoesters. The present protocol provides a convenient and attractive approach to various quinoline-2,4-carboxylates in moderate to good yields with excellent functional group tolerance.
基金the Natural Science Foundation for Colleges and Universities of Jiangsu Province(No.17KJD150005)Science and Technology Project Funds of Lianyungang City(No.SH1627)+1 种基金Science and Technology Development Fund of Nanjing Medical University(Nos.2016NJMU011 and 2016NJMUZD021)Science and Technology Funds of Kangda College of Nanjing Medical University(Nos.KD2016GCCRCYJ01 and KD2016KYJJZD002)
摘要A gold(Ⅰ)-catalyzed three-component reaction of β-nitrostyrenes with 1,3-dicarbonyl compounds and primary amines to form polysubstituted pyrroles has been developed at room temperature in ethanol.The key advantages of the three-component reaction are the mild reaction conditions and environmentally safer solvent.
基金support from the Science and Technology Innovation Program of Hunan Province(No.2021RC2079)China Postdoctoral Science Foundation(Nos.2022T150075 and 2022M720541)+2 种基金Hunan Provincial Department of Education Outstanding Youth Project(No.22B0212)Tianjin Synthetic Biotechnology Innovation Capacity Improvement Project(No.TSBI-CIP-CXRC-038)National College Students Innovation and Entrepreneurship Training Program(No.S202210537024).
摘要An efficient and practical electrochemical method for the three-component reaction cascade Mumm rearrangement of imides has been developed using a simple undivided cell with carbon electrodes at room temperature,which provides a useful strategy for the rapid synthesis of sulfur-containing imides with broad substrate scope and high functional tolerance.It is a rare example of in situ generation of O-acyl isoamide precursor for Mumm rearrangement.
基金financially supported by the National Natural Science Foundation of China(No.21172190)the Priority Academic Program Development of Jiangsu Higher Education Institutions
摘要The three-component reaction of triphenylphosphine,dialkyl but-2-ynedioate and arylidene pivaloylacetonitrile in dry methylene dichloride at room temperature resulted in unexpected densely substituted 1-(triphenyl-λ^5-phosphanylidene)ethyl)-2,3-dihydrofurans in satisfactory yields with high diastereoselectivity.The relative configuration of the 2,3-dihydrofurans was elucidated by determination of single crystal structures.
基金supported by the National Natural Science Foundation of China(Nos.21072054,21572051,21602057)the Ministry of Education of China(No.213027A)the Scientific Research Fund of Hunan Provincial Education Department(No.15A109)
摘要In this work, an efficient copper-catalyzed three-component reaction for the synthesis of sulfenylimidazo [1,2-a]pyridines using elemental sulfur as the sulfenylating agents has been developed. The reaction could proceed smoothly with a high degree of functional group tolerance and provide the desired products in moderate to good yield.
基金Supported by the National Natural Science Foundation of China(No.20972132)
摘要The three-component reaction of aromatic aldehyde,malononitrile and aliphatic amine in a mixed solvent of methanol and water exhibited very interesting molecular diversity and gave the derivatives of polysubstituted N-methyldihydropyridines,2-dialkylaminopyridines and 2-methoxypyridines as main products according to the structure of aliphatic amines used.
基金supported by the National Natural Science Foundation of China(Grant Nos:52309120,52279091,52509127)the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions[PAPD]+1 种基金the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(Grant No:23KJB570003)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX25_3992)。
摘要Waterjet propulsion systems,as the predominant form of propulsion for high-performance vessels,are widely employed in military ships across various navies.However,when operating in shallow water conditions,underwater suction vortices(USVs)are prone to form near the pump inlet.These vortices can markedly degrade the hydraulic performance of the waterjet propulsion system by reducing efficiency and potentially inducing cavitation and associated vibrations.The formation and evolution of USVs occur underwater,rendering them highly elusive and difficult to detect or measure accurately.As a result,investigating the underlying mechanisms of USV generation and developing effective control strategies remain substantial challenges in the field.To achieve precise identification and capture of USVs,volumetric three component velocimetry technology was employed to conduct high-precision analyses of the three-dimensional spatiotemporal evolution signals and vortex dynamic characteristics of USVs throughout their entire lifecycle.The findings demonstrate that the typical evolution of USVs can be categorized into five stages:precursor,inception,development,weakening,and dissipation.During their evolution,both velocity and vorticity within USVs initially increase before subsequently decreasing.Notably,the velocity distribution within the vortex core conforms to the Rankine composite vortex model.The adverse pressure gradient at the riverbed,combined with the suction flow of the pump,directly facilitates USV generation.These findings provide a critical foundation for USV identification,offering a valuable method for flow-field testing in vortex and other fault identification,while overcoming the limitations of conventional point sensors in complex flow diagnostics.
摘要A sequential one-pot two-step reaction for efficient synthesis of pyrrolo[2,1-a]isoquinoline and pyrrolo[1,2-a]- quinoline derivatives in good yields has been successfully developed. The reaction included firstly Cu-catalyzed three-component reaction of isoquinoline (quinoline), acetylenedicarboxylate and alkynylbenzene and then Pd-catalyzed intramolecular C(sp)-C(sp^2) coupling reaction of initially formed 1-alkenyl-2-alkynyl- 1,2-dihydroiso- quinoline (1,2-dihydroquinoline).
基金This work was supported by the Key Project Program of the Educational Department of Hunan Province(No.18A069)the Postgraduate Scientific Research Innovation Project of Hunan Province(No.QL20210148)+3 种基金the Scientific Research Foundation of Hunan Provincial Education Department(No.19C0522)the Scientific Research Foundation of Hunan Institute of Technology(No.2018HY011)the Project of Innovation Team of the Ministry of Education(No.IRT_17R90)Hunan 2011 Collaborative Innovation Center of Chemical Engineering&Technology with Environmental Benignity and Effective Resource Utilization.
摘要A strategy for the synthesis of benzisothiazoles by a three-component reaction was developed using elemental sulfur and ammonium as heteroatom components under transition metal-free conditions.The reaction is preferably based on pyridine or quinoline ring substrate,and good to excellent yields can be obtained.Notably,this reaction has been applied to the gram-scale synthesis of bioactive molecules.
基金the National Natural Science Foundation of China(No.22001034)Jiangxi Provincial Natural Science Foundation(No.20212BAB213001).
摘要A H4SiW12O40-catalyzed three-component tandem reaction of 2-acylbenzoic acids,primary amines and phosphine oxides to form 3,3-disubstituted isoindolinones was developed.By employing A H4SiW12O40as the catalyst and dimethyl carbonate(DMC)as the solvent,a diverse range of 2-acylbenzoic acid derivatives and primary amines worked well to give the C3-phosphinoyl-functionalized 3,3-disubstituted isoindolinones with the yield range of 61%-87%.Advantages of this transformation include green catalyst and solvent,available starting materials,broad substrate scope,high efficiency and operational simplicity with water as the sole by-product.The strategy achieved an efficient and green molecular fragment assembly to access isoindolinones,which would provide opportunities for the synthesis of potential biologically active molecules in a green manner.
基金the National Natural Science Foundation of China(No.22101059)the financial support from Guangxi Science and Technology Program of China(No.2023GXNSFBA026275)Guangxi Normal University。
摘要A novel photocatalytic energy transfer-driven radical relay strategy has been introduced for the chemoand regioselective 1,4-difunctionalization of carbon-sulfur double bonds.This represents the first instance of radical-mediated dual-functionalization of X-Y type unsaturated bonds,enabling the synthesis of complex linear molecules with C–O,C–N,and C-S bonds in a single operation.The method surpasses traditional approaches by avoiding the need for thiourea intermediates and the harsh conditions typically associated with them.The developed strategy exemplifies versatility,being applicable to 1,4-oxyamination,1,4-diamination,and 1,4-sulfonamination reactions,and has demonstrated compatibility with over 60 different substrates.The research also elucidates the role of electronic complementarity between radicals and receptors in achieving high selectivity in 1,4-difunctionalization reactions.This study significantly advances the field of bifunctionalization and remote difunctionalization reactions,with profound implications for the development of pharmaceuticals and materials science.