检索结果-南通市图书馆

Visible-light-driven thio-carboxylation of alkynes with CO_(2):facile synthesis of thiochromones

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2023年第5期66卷 1457-1466页

作者： Meng Miao Lei Zhu Hong Zhao Lei Song Si-Shun Yan Li-Li Liao jian-heng ye Yu Lan Da-Gang Yu Key Laboratory of Green Chemistry&Technology of Ministry of Education College of ChemistrySichuan UniversityChengdu 610064China College of Pharmacy Third Military Medical UniversityChongqing 400038China School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Theoretical and Computational ChemistryChongqing UniversityChongqing 400030China College of Chemistry and Institute of Green Catalysis Zhengzhou UniversityZhengzhou 450001China

Difunctionalizing carboxylation of alkynes with CO_(2)is a sustainable and important strategy to generate valuable acrylate derivatives from both readily available starting *** protocols,however,always suffer from the use of excess metallic reagents and transition metal ***,we report the first thio-carboxylation of alkynes with thiophenols and CO_(2),which is a visible-light-driven and transition metal-free *** contrast to previous carboxylations of alkynes via two-electron activation of CO_(2),mechanistic and computational investigations suggest that the single-electron activation of CO_(2)is involved in the thio-carboxylation,rendering uniqueβ-*** following cyclizing acylation affords important thiochromones ***,the one-pot method features mild reaction conditions(room temperature,1 atmosphere of CO_(2)),high chemo-and regio-selectivity,easy scalability and facile derivatization of products to bioactive compounds.

关键词： carbon dioxide visible light carboxylation thiochromones

Visible-light photoredox-catalyzed carboxylation of aryl epoxides with CO_(2)

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第7期35卷 281-284页

作者： Tian-Yu Gao Xiao-Yan Mo Shu-Rong Zhang Yuan-Xu jiang Shu-Ping Luo jian-heng ye Da-Gang Yu Key Laboratory of Green Chemistry&Technology of Ministry of Education College of ChemistrySichuan UniversityChengdu 610064China State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of TechnologyHangzhou 310014China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China

Herein, we report the first visible-light photoredox-catalyzed carboxylation of aryl epoxides with CO_(2)to synthesize hydroxy acid derivatives. A variety of valuable β-, γ-, δ-, ε–hydroxy acid derivatives are obtained in moderate to high yields under mild conditions. This protocol shows noteworthy functionalgroup compatibility, high chemo-and regioselectivities under transition-metal-free conditions with an inexpensive organo-dye as photosensitizer. Mechanistic studies indicate that the benzylic carbanion is generated as an intermediate via the sequential single electron transfer(SSET) process.

关键词： Carbon dioxide Epoxides Visible-light photoredox catalysis Hydroxy acid Sequential single electron transfer

Photocatalytic dicarboxylation of strained C-C bonds with CO_(2) via consecutive visible-light-induced electron transfer

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第6期35卷 268-273页

作者： Yi Liu Zhe-Hao Wang Guan-Hua Xue Lin Chen Li-Hua Yuan Yi-Wen Li Da-Gang Yu jian-heng ye Key Laboratory of Green Chemistry&Technology of Ministry of Education College of ChemistrySichuan UniversityChengdu 610064China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China

Dicarboxylic acids have a wide range of applications in the polymer industry to construct valuable *** has recently emerged as an efficient and sustainable strategy to generate dicarboxylic ***,photocatalytic dicarboxylation with CO_(2) is mainly limited to unsaturated bonds,and the dicarboxylation of C-C single bonds still remains a ***,we report a photocatalytic dicarboxylation of C-C single bonds in strained rings with CO_(2) units via consecutive photo-induced electron transfer(ConPET).It is also the first photocatalytic reductive ring-opening reaction of ***,this transition-metal-free protocol exhibits good functional group tolerance,broad substrate scope,facile scalability,and easy product ***,diacids can easily be derivatized to mainchain liquid crystalline polyesters.

关键词： Consecutive photo-induced electron transfer Visible-light catalysis Dicarboxylation Carbon dioxide Cyclopropanes

Lactonization of C（sp2）-H Bonds in Enamides with CO2

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2018年第5期36卷 430-436页

作者： Zhen Zhang Chun-Jun Zhu Meng Miao Jie-Lian Han Tao Ju Lei Song jian-heng ye Jing Li Da-Gang Yu College of Pharmacy and Biological Engineering Chengdu University Chengdu Sichuan 610106 China Key Laboratory of Green Chemistry & Technology of Ministry of Educa- tion College of Chemistry Sichuan University Chengdu Sichuan 610064 China State Key Laboratory of EJemento-Organic Chemistry Nankai University Tianjin 300071 China

Herein, we report a novel synthesis of 1,3-oxazin-6-ones from enamides with CO2 through C--H carboxylation and one-pot cyclization. This transition-metal-free and redox-neutral process features broad substrate scope, good functional group tolerance and facile product derivatization. The nucleophilic attack to CO2 from the electron-rich alkene is demonstrated for this reaction.

关键词： carbon dioxide transition-metal-free lactonization 1,3-oxazin-6-ones

Cu-Catalyzed Selective Oxy-Cyanoalkylation of Allylamines with Cycloketone Oxime Esters and CO2

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2020年第1期38卷 69-76页

作者： Chuan-Kun Ran He Huang Xing-Hui Li Wei Wang jian-heng ye Si-Shun Yan Bi-Qin Wang Chun Feng Da-Gang Yu College of Chemistry and Materials Science Sichuan Normal UniversityChengduSichuan 610068China Key Laboratory of Green Chemistry&Technology of Ministry of Education College of ChemistrySichuan UniversityChengduSichuan 610064China Beijing National Laboratory for Molecular Sciences Beijing 100190China

Summaryof main observation and conclusion The radical-initiated carboxylativecyclization of allylamines with CO2represents an efficientand highly promising strategy to afford valuable ***,the radical precursorsand pathways to generate radicals in such processes are still ***,we report the firstCu-catalyzed selective oxy-cyanoalkylation of allylamines with cycloketone oxime esters and CO2viaC-C bond *** cyanoalkyl-substituted 2-oxazolidinones are obtained in moderate togood yields withhigh regio-and *** utility ofthis re-dox-neutral and cyanide-free method is demonstrated with mild conditions,broad substrate scope,good functional group tolerance and easy scalability.

关键词： amines ketone alkylation

Visible-Light-Driven Anti-Markovnikov Hydrocarboxylation of Acrylates and Styrenes with CO_(2)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2021年第6期3卷 1746-1756页

作者： He Huang jian-heng ye Lei Zhu Chuan-Kun Ran Meng Miao Wei Wang Hanjiao Chen Wen-Jun Zhou Yu Lan Bo Yu Da-Gang Yu Key Laboratory of Green Chemistry&Technology of Ministry of Education College of ChemistryAnalytical&Testing CenterSichuan UniversityChengdu 610064 School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400030 College of Chemistry and Institute of Green CatalysisZhengzhou UniversityZhengzhou 450001

Light-driven carbon dioxide(CO_(2))capture and utilization is one of the most fundamental reactions in ***,we report the first visible-light-driven photocatalyst-free hydrocarboxylation of alkenes with CO_(2).Diverse acrylates and styrenes,including challenging tri-and tetrasubstituted ones,undergo anti-Markovnikov hydrocarboxylation with high selectivities to generate valuable succinic acid derivatives and 3-arylpropionic *** addition to the use of stoichiometric aryl thiols,the thiol catalysis is also developed,representing the first visible-lightdriven organocatalytic hydrocarboxylation of alkenes with CO_(2).The UV-vis measurements,NMR analyses,and computational investigations support the formation of a novel charge-transfer complex(CTC)between thiolate and acrylate/*** mechanistic studies and density functional theory(DFT)calculations indicate that both alkene and CO_(2)radical anions might be generated,illustrating the unusual selectivities and providing a novel strategy for CO_(2)utilization.

关键词： visible light carbon dioxide chargetransfer complex anti-Markovnikov selectivity carboxylation

Radical-type transformations of CO2

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Radical-type transformations of CO2

Prussian Blue Analogue‑Templated Nanocomposites for Alkali‑Ion Batteries:Progress and Perspective

中国化学会第十二届全国物理有机化学学术会议

作者： jian-heng ye Zhu-Bao Yin Lei Song Si-Shun Yan Wen-Jun Zhou Da-Gang Yu College of Chemistry Sichuan University

CO is not only a greenhouse gas but also an inexpensive and renewable carbon *** is very important to utilize such a one-carbon(C1)building block in organic synthesis to construct valuable ***,it is very challenging due to its thermodynamic and kinetic stability and *** significant progress has beenthere are lots of limitations in reaction system and substrate scope in this field.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 216-261页

作者： jian‑En Zhou Yilin Li Xiaoming Lin Jiaye ye Key Laboratory of Theoretical Chemistry of Environment Ministry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006People’s Republic of China School of Chemistry and Physics Faculty of ScienceQueensland University of Technology2 George StreetBrisbaneQLD 4000Australia Centre for Materials Science Queensland University of Technology2 George StreetBrisbaneQLD 4000Australia

Lithium-ion batteries(LIBs)have dominated the portable electronic and electrochemical energy markets since their commercialisation,whose high cost and lithium scarcity have prompted the development of other alkali-ion batteries(AIBs)including sodium-ion batteries(SIBs)and potassium-ion batteries(PIBs).Owing to larger ion sizes of Na^(+)and K^(+)compared with Li^(+),nanocomposites with excellent crystallinity orientation and well-developed porosity show unprecedented potential for advanced lithium/sodium/potassium *** enticing open rigid framework structures,Prussian blue analogues(PBAs)remain promising self-sacrificial templates for the preparation of various nanocomposites,whose appeal originates from the well-retained porous structures and exceptional electrochemical activities after thermal *** review focuses on the recent progress of PBA-derived nanocomposites from their fabrication,lithium/sodium/potassium storage mechanism,and applications in AIBs(LIBs,SIBs,and PIBs).To distinguish various PBA derivatives,the working mechanism and applications of PBA-templated metal oxides,metal chalcogenides,metal phosphides,and other nanocomposites are systematically evaluated,facilitating the establishment of a structure–activity correlation for these *** on the fruitful achievements of PBA-derived nanocomposites,perspectives for their future development are envisioned,aiming to narrow down the gap between laboratory study and industrial reality.

关键词： Prussian blue analogues Self-sacrificial template Lithium-ion batteries Sodium-ion batteries Potassium-ion batteries

Electro-reductive carboxylation of C–Cl bonds in unactivated alkyl chlorides and polyvinyl chloride with CO2

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第12期35卷 439-443页

作者： Li Li Zhi-Xin Yan Chuan-Kun Ran Yi Liu Shuo Zhang Tian-Yu Gao Long-Fei Dai Li-Li Liao jian-heng ye Da-Gang Yu Key Laboratory of Green Chemistry&Technology of Ministry of Education College of ChemistrySichuan University School of Chemistry and Chemical Engineering Chongqing Key Laboratory of Chemical Theory and MechanismChongqing University

The carboxylation of readily available organo halides with CO2represents a practical strategy to afford valuable carboxylic ***,efficient carboxylation of inexpensive unactivated alkyl chlorides is still ***,we report the electro-reductive carboxylation of C–Cl bonds in unactivated chlorides and polyvinyl chloride with CO2.A variety of alkyl carboxylic acids are obtained in moderate to good yields under mild conditions with high ***,the utility of this electroreductive carboxylation is demonstrated with great potential in polyvinyl chloride （PVC） upgrading,which could convert discarded PVC from hydrophobic to hydrophilic functional *** experiments support the successive single electron reduction of unactivated chlorides to generate alkyl anion species and following nucleophilic attack on CO2to give desired products.

关键词： Carbon dioxide Carboxylation Electrochemistry Unactivated alkyl chlorides Polyvinyl chloride