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Chinese Journal of Chemistry 2024年第8期42卷 846-852页

作者： Ting Chen Wei Feng Ruitong Yang Shanping Chen guo-jun deng Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtanHunan411105 China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiangHunan453007 China

Comprehensive Summary,A convenient approach for the construction of 2-aminobenzothiazoles via I2-catalyzed tandem cyclization reaction of amines and carbon disulfide has been *** present approach starts from simple and readily available starting materials,affording a series of 2-aminobenzothiazoles in up to 89%yields under metal-free *** this work,C—H/N—H functionalization was achieved and multiple C-hetero bonds were successfully constructed in one pot.

关键词： Sulfur heterocycles C-H functionalization Cyclization Tandem reaction Transition-metal-free Amines lodine N-Heterocycles

Copper/Photoredox-Catalyzed Regioselective 1,4-Addition to 1,3-Enynes: A Convenient Access to Perfluoroalkylated Allenes

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Chinese Journal of Chemistry 2024年第17期42卷 2023-2028页

作者： Ya Chen Quanyuan Wang Keyi Peng Lilei Cheng Ziyi She guo-jun deng Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of EnvironmentallyFriendly Chemistry andApplication of Ministryof EducationCollege of ChemistryXiangtan UniversityXiangtanHunan 411105China Department School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiangHenan 453007China

A general and broadly applicable copper and photoredox dual-catalyzed multicomponent 1,4-perfluoroalkylcyanation of 1,3-enynes has been *** protocol enjoys success with high regioselectivity,mild reaction conditions,and excellent functional-group tolerance,allowing the facile synthesis of structurally diverse perfluoroalkylated allenes from readily available fluoroalkyl halides,1,3-enynes and TMscN in a one-pot manner.A reasonable mechanism has been proposed according to a series of control experiments.

关键词： Fluorinated allenes 1 3-Enynes Photoredox Fluoroalkylation Multicomponent reactions Difunctionalization Radicals Regioselectivity

Transition-metal free trifluoromethylimination of alkenes enabled by direct activation of N-unprotected ketimines

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Chinese Chemical Letters 2024年第9期35卷 155-159页

作者： Boqiang Wang Yongzhuo Xu Jiajia Wang Muyang Yang guo-jun deng Wen Shao Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105China Department School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

A highly site-selective intermolecular trifluoromethylimination of activated and unactivated olefins was reported under transition-metal-and photosensitizer-free *** newly developed strategy provides straightforward and efficient access to diverse value-added vicinal trifluoromethyl amines without resorting to the pre-functionalized *** experiments demonstrate that the approach proceeded through CF_(3)and iminyl two-radicals process,which were generated directly from commercially available benzophenone imine in a novel electron-donor mode via a SET process activated by the bifunctional hypervalent iodine *** synthetic potential of the protocols was further showcased via the condensation/amination sequential cascade,and transformations to accessβ-CF_(3)primary amines.

关键词： Transition-metal free Alkenes difunctionalization Amination Trifluoromethylation Single-electron transfer

Chemoselective synthesis of α-carboline derivatives via hypervalent iodine-catalyzed [3+3] annulation under metal-free conditions

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Green Synthesis and Catalysis 2024年第2期5卷 112-116页

作者： Shuowen Wang Rong Li Shanping Chen guojiang Mao Wen Shao guo-jun deng Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105China Department School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

A strategy for the synthesis ofα-carboline derivatives from indole-3-carboxaldehydes and 3-aminocyclohex-2-enones under metal-free conditions has been *** combination use of phenyliodine(Ⅲ)diacetate(PIDA)and benzoic acid could significantly facilitate the corresponding[3+3]annulation *** newly developed strategy featured unextraordinary chemoselectivity,good functional group tolerance and the preservation of the carbonyl group of the ketone substrates,which offers the possibility for further transformation of the products.

关键词： Hypervalent iodine-catalysis Annulation Metal-free α-Carboline Chemoselectivity

Synthesis of biheteroaryls via 2-methyl quinoline C(sp^(3))-H functionalization under metal-free conditions

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Green Synthesis and Catalysis 2024年第1期5卷 73-76页

作者： Dahan Wang Yuhan Yang Fuhong Xiao Jinbing Liu guojiang Mao guo-jun deng Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education Hunan Province Key Laboratory of Green Organic Synthesis and ApplicationCollege of ChemistryXiangtan UniversityXiangtan 411105China Department of Food and Chemical Engineering Shaoyang UniversityShaoyang 422100China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

An acetic acid-promoted C(sp^(3))-H functionalization of 2-methyl quinoline,enaminoesters and elemental sulfur for the synthesis of 3,4,5-trisubstituted isothiazoles under metal-free conditions has been *** approach provides viable access to various 5-(quinolin-2-yl)isothiazoles in moderate to good yields with good functional group ***,the success of the gram-scale reaction gives this reaction a great potential application.

关键词： C(sp^(3))-H functionalization Multicomponent reactions Biheteroaryls Elemental sulfur Metal-free

Diverse catalytic systems for nitrogen-heterocycle formation from O-acyl ketoximes

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Chinese Chemical Letters 2023年第1期34卷 19-28页

作者： Zhonghua Qu Tong Tian guo-jun deng Huawen Huang Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

O-Acyl ketoximes has been proven to be versatile building blocks for practical construction of *** the last few years,diverse catalytic systems have been discovered to enable efficient transformations of O-acyl ketoximes to a range of ***,we summarized our recent examples of novel nitrogen-heterocycle formation with new function findings of O-acyl ketoximes through facile aerobic copper catalysis,metal-free N–O bond activation,multi-component assembly,and *** the green chemistry perspective,these works represent efficient methods with high atom economy,high selectivity,and minimized chemical *** findings also complement well to the previous mainly copper-based catalytic systems and more importantly enrich the oxime chemistry in organic synthesis.

关键词： Nitrogen-heterocycle O-Acyl ketoximes Annulations Copper catalysis Metal-free Multi-component

Three-Component Synthesis of 2-Heteroaryl-3-hydroxybenzo[b]- thiophenes under Transition-Metal-Free Conditions

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Chinese Journal of Chemistry 2021年第9期39卷 2483-2488页

作者： Dahan Wang Fuhong Xiao Feng Zhang guo-jun deng Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtanHunan 411105China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of TechnologyGuangzhouGuangdong 510640China

A convenient synthetic route to 2-heteroaryl-3-hydroxybenzo[b]thiophene derivatives via K_(2)CO_(3)-promoted multicomponent cycliza-tion between o-halogenated benzaldehyde,2-methylquinolines and sulfur powder has been *** reaction is performed smoothly under simple conditions to give the corresponding products in moderate to good *** resultant 3-hydroxybenzo[b]thiophenes have been proved to be versatile building blocks in a range of transition-metal-catalyzed cross-coupling reactions.

关键词： Benzothiophenes Transition-metal-free C-H activation Sulfur Multicomponent reactions

Cu-Catalyzed Cascade Cyclization of Ketoxime Acetates and Alkynals Enabling Synthesis of Acylpyrroles

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Chinese Journal of Chemistry 2021年第5期39卷 1175-1180页

作者： Zhenhua Xu Ning Xian Hongbiao Chen guo-jun deng Huawen Huang Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtanHunan 411105China

A facile copper-based catalytic system has been developed to enable efficient cyclization of methylketoximes and *** protocol provides a viable entry to synthetically and pharmaceutically useful 2-acylpyrroles with a broad range of compatible ***,a key acyl migration is probably involved that leads to the formation of N-acyl pyrroles or otherwise NH pyrroles by further *** importantly,the present reaction system also gives an opportunity to realize three-component pyrrole assembly by simple addition of carboxylic acid.

关键词： Copper catalysis Nitrogen heterocycles Cyclization Ketoximes Alkynals

Copper-Catalyzed Aerobic Oxidative Ring Expansion of Isatins: A Facile Entry to Isoquinolino-Fused Quinazolinones

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Chinese Journal of Chemistry 2021年第1期39卷 87-92页

作者： Dahan Wang Fuhong Xiao Feng Zhang Huawen Huang guo-jun deng Key Laboratory of Enirnmentoly Friendly Chemistry and Aplication of Ministry of Eduction Hunan Province Key laboratory of Green Organic Synthesis and ApplicationCollege of ChemistryXiangtan UniversityXiangtanHunan 411105China School of Chemistry and Materials Science Hunan Agricutural UniversityChangshaHunan 410128China

A copper-catalyzed aerobic oxidative ring expansion reaction of isatins with 1,2,3,4-tetrahydroisoquinoline for the synthesis of tetra-cyclic quinazolinones has been *** reaction is performed smoothly under simple con... 详细信息

关键词： Copper catalysis Oxidation Cyclization Quinazolinones C-H Activation

Rhodium(III)-catalyzed successive C(sp^(2))-H and C(sp^(2))-C(sp^(2))bond activation of aryl oximes:synthetic and mechanistic studies

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Organic Chemistry Frontiers 2022年第3期9卷 822-830页

作者： Cheng Li Huawen Huang Fuhong Xiao Bin Zhao guo-jun deng Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105China

Merging selective C-H cleavage with C-C cleavage in a tandem reaction has been a practical strategy that permits skeletal diversification from simple raw ***,we describe a rhodium(III)-catalyzed redox-neutral reaction... 详细信息

关键词： materials catalyzed cleavage