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Chinese Chemical Letters 2024年第9期35卷 130-134页

作者： Yuemin Chen Yunqi Wu Guoao Wang Feihu Cui Haitao Tang yingming pan State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical Sciences of Guangxi Normal UniversityGuilin 541004China

An efficient and scalable electrochemical asymmetric protocol with metal-free catalysts and even without additional oxidants for the cross-dehydrogenative coupling reaction(CDC)of two C(sp^(3))-H bonds is reported.A series of aldehydes including natural products and various substrates containing C(sp^(3))-H bonds including xanthenes,acridines,cycloheptatrienes and even diarylmethane have been shown to undergo asymmetric CDC to afford a series of carbon-carbon bond coupling products with up to 94%yield and 98%*** studies such as radical clock experiment suggest that the reaction proceeds via nucleophilic attack by enamine under electrochemical conditions.

关键词： Aminocatalysis Electrochemistry Asymmetric catalysis CDC of C(sp^(3))-H bonds

Well-defined coordination environment breaks the bottleneck of organic synthesis:Single-atom palladium catalyzed hydrosilylation of internal alkynes

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Nano Research 2022年第2期15卷 1500-1508页

作者： Shicheng Ren Bochao Ye Siying Li Liping pang yingming pan Haitao Tang State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004China

Single-atom site(SAS)catalysts have attracted considerable attention due to their excellent ***,most of the current research models of SAS catalysts are based on inorganic catalysts,where“metal and coordination atom interaction”cannot simulate the fine-tuning effect of organic ligands on metal catalytic centers in homogeneous ***,certain chemical transformations in homogeneous catalysis cannot be perfectly ***,we used porous organic ligand polymers as the carrier,which effectively changes the charge regulation of nanoparticles and monoatomic metal *** lessons from traditional homogeneous metal/ligand catalysis,we introduced various functional groups into the ligand polymers to adjust the electronic properties,and successfully realized the hydrosilylation of internal alkynes with high catalytic *** selectivity and catalytic efficiency under the Pd@POL-1 catalyst system were improved compared with previous *** internal alkynes with various structures can complete this reaction,and the ratio of E/Zcan reach up to 100:1.

关键词： single-atom site catalysts porous organic ligand polymers palladium catalysis hydrosilylation internal alkynes

Electrochemically mediated decarboxylative acylation of N-nitrosoanilines with α-oxocarboxylic acids

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Chinese Chemical Letters 2023年第2期34卷 170-173页

作者： Xinyu Wang Shihong Wu Yujing Zhong Yingchun Wang yingming pan Haitao Tang State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical Sciences of Guangxi Normal UniversityGuilin 541004China College of Chemistry and Chemical Engineering Jishou UniversityJishou 416000China

An efficient palladium-catalyzed electrooxidation C–H acylation reaction of N-nitrosoanilines with α-oxocarboxylic acids was developed. The anodic oxidation of the Pd(Ⅱ) intermediate was found to be the key to complete the reaction. In this case, the N-nitroso group was observed to be an effective directing group for C–H activation reaction. Moreover, the synthetic transformation of derivatives of natural products(L-menthol, dehydroepiandrosterone, and pregnenolone) was successfully realized. Finally, flow electrochemical synthesis of some substrates was achieved.

关键词： Eelectro-oxidation C-H acylation N-Nitrosoanilines Flow electrochemical synthesis

Simultaneous Reduction of Aldehyde Group to Hydroxymethyl Group in Palladium-catalyzed Suzuki Cross-coupling Reaction

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Chemical Research in Chinese Universities 2014年第4期30卷 614-618页

作者： WANG Yingchun LI Xiuying LI Yajun pan yingming CHENG Keguang WANG Hengshan College of Chemistry and Chemical Engineering Jishou University Jishou 416000 P. R. China Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Ministry of Education School of Chemistry & Chemical Engineering Guangxi Normal University Guilin 541004 P. R. China

The authors presented an efficient method for the palladium-catalyzed Suzuki cross-coupling reaction with the simultaneous reduction of the aldehyde to a hydroxymethyl *** method allows halide substituted aryl aldehydes to readily react with arylboronic acids,producing polycyclic aromatic alcohols in moderate to good *** reaction was catalyzed by Pd（OAc）2（3％,molar fraction） at 150 ℃ in the presence of 6％（molar fraction）1,4-diazabicyclo[2.2.2]octane（DABCO） and 3 times the molecular weight of K2CO3 in the mixture solvent of N,N-dimethylformamide（DMF）/H2O [V（DMF）∶ V（H2O）=5∶1].

关键词： Palladium Suzuki cross-coupling Reduction Polycyclic aromatic alcohol

Spectroscopic Studies on the Binding of Kaempferol-3,7-α-L- rhamnopyranoside to Bovine Serum Albumin

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Chinese Journal of Chemistry 2012年第2期30卷 438-444页

作者： Yao,Di Yu,Jing pan,yingming Huang,Fuping Bian,Hedong Yu,Qing Liang,Hong Chen,Zhenfeng Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources(Guangxi Normal University) Ministry of Education of ChinaGuilinGuangxi 541004China

The binding of kaempferol-3,7-α-L-rhamnopyranoside （KRR） with bovine serum albumin （BSA） was investi- gated by different spectroscopic methods under simulative physiological conditions. Analysis of fluorescence quenching data of BSA by KRR at different temperatures using Stern-Volmer methods revealed the formation of a ground state KRR-BSA complex with moderate binding constant of the order 10^4 Lomol-1. The existence of some metal ions could weaken the binding of KRR on BSA. The changes in the van＇t Hoff enthalpy （△H0） and entropy （△S0） of the interaction were estimated to be --26.53 ***-1 and 3.33 ***-l.K-1 and both hydrophobic and electrostatic forces contributed to stabilizing the BSA-KRR complex. According to the F6ster theory of non-radiation energy transfer, the distance r between the donor （BSA） and the acceptor （KRR） was obtained （r= 2.83 nm）. Site marker competitive experiments showed that KRR could bind to Site I of BSA. In addition, synchronous fluorescence, UV-Vis absorption and circular dichroism （CD） results indicated that the KRR binding could cause conformational changes of BSA.

关键词： kaempferol-3,7-α-L-rhamnopyranoside bovine serum albumin UV-Vis spectroscopy fluorescence spectroscopy circular dichroism

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有机化学线上课程改革创新教学实践

中国现代教育装备 2024年第5期 96-98页

作者：李姝慧唐海涛王深艺潘英明广西师范大学化学与药学学院/省部共建药用资源化学与药物分子工程国家重点实验室广西桂林541004

近年来,各高校积极开展了线上课程教学的探索和实践。以有机化学课程的线上教学为例,以线下课程为基准对线上课程教学任务进行改革和创新,从教学理念、教学实施、教学过程、教学效果四个方面对线上教学进行了剖析,并进行了教学反思,为... 详细信息

近年来,各高校积极开展了线上课程教学的探索和实践。以有机化学课程的线上教学为例,以线下课程为基准对线上课程教学任务进行改革和创新,从教学理念、教学实施、教学过程、教学效果四个方面对线上教学进行了剖析,并进行了教学反思,为后疫情时代线上线下混合式教学研究提供了借鉴。

关键词：有机化学线上课程教学改革创新

Transition metal-free catalytic formylation of carbon dioxide and amide with novel poly(ionic liquid)s

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Green Synthesis and Catalysis 2022年第2期3卷 162-167页

作者： Peibo Chen Xiaoyu Tang Xiujin Meng Haitao Tang yingming pan Ying Liang School of Life and Environmental Sciences Guilin University of Electronic Technology Guilin 541004China State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical Sciences of Guangxi Normal UniversityGuilin 541004China

Functionalised mesoporous poly(ionic liquid)s are valuable carbon dioxide capture and conversion ***,an imidazole poly(ionic liquid)PIL-s1-HCO_(3) with a mesoporous structure was formed by the copolymerisation of vinyl-modified ionic liquids and crosslinking *** material has excellent adsorption properties for carbon *** it as the catalyst,the formylation of carbon dioxide with various amides was realised at room temperature and pressure without metal *** addition,the material is stable in performance,easily separated,and has good *** this work,relying on the new PIL as a multi-functional platform,carbon dioxide capture and the transformation to high-value-added chemicals were completed simultaneously.

关键词： Carbon dioxide Poly(ionic liquid)s Heterogeneous catalysis Formylation

Electrochemically mediated three-component synthesis of isothioureas using thiols as sulfur source

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绿色合成与催化(英文) 2023年第1期4卷 41-45页

作者： Muxue He Pingfu Zhong Hanfu Liu Chuhong Ou yingming pan Haitao Tang State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical Sciences of Guangxi Normal UniversityGuilin 541004China Guangxi Key Laboratory of Environmental Exposomics and Entire Lifecycle Health School of Public Health of Guilin Medical UniversityGuilin 541199China

The simultaneous binding/dissociation of multiple bonds in a one-pot manner by multicomponent reactions provide an important approach for developing novel and sustainable pathway in the drug discovery *** we develop an electrocatalytic three-component reaction to construct multifunctional and valuable isothiourea compounds,which uses thiols,isocyanides and amines as *** with the previous work,the organic electrosynthesis technique can avoid the requirement of heavy metal catalysts and stoichiometric *** addition,using thiol as a substrate to participate in the three-component reaction broadens the source of sulfur,which can also construct more abundant isothiourea derivatives.

关键词： Multicomponent reaction Isothiourea Organic electrosynthesis Thiol

Can the integration between urban and rural areas be realized?A new theoretical analytical framework

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Journal of Geographical Sciences 2024年第1期34卷 3-24页

作者： WANG Yi LU Yuqi ZHU yingming Research Base of Jiangsu Industrial Cluster School of Economics and ManagementNanjing University of Science and TechnologyNanjing 210094China School of Geography Nanjing Normal UniversityNanjing 210023China

Urban-rural integration is an advanced form resulting from the future evolution of urban-rural ***,little research has explored whether urban and rural areas can move from dual segmentation to integrated development from a theoretical or empirical *** on the research framework of welfare economics,which offers an appealing paradigm to frame the underlying game between cities and villages,this study clarifies the ideal state of urban-rural *** then proposes a series of basic assumptions,and constructs a corresponding objective function and its ***,it assesses the possibility of seeing the transmutation from division to integration between urban and rural areas with continuous socio-economic *** authors argue that the ideal state of urban-rural integration should be a Pareto-driven optimal allocation of urban-rural resources and outputs,and the maximization of social welfare in the entire *** on a systematic demonstration using mathematical models,the study proposes that urban and rural areas can enter this ideal integrated development pattern when certain parameter conditions are *** general,this study demonstrates the theoretical logic and scientific foundations of urban-rural integration,enriches theoretical studies about urban-rural relationships,and provides basic theoretical support for large developing countries to build a coordinated and orderly urban-rural community with a shared future.

关键词： urban-rural integration development ideal state parameter conditions welfare economics theoretical framework

炔烃与二醇通过碳-碳叁键裂解的电化学酯化反应

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有机化学 2021年第1期41卷 435-436页

作者：唐海涛潘英明广西师范大学化学与药学学院广西桂林541004

碳-碳键的裂解反应作为一种有用的合成工具可用于构建许多有价值的化合物,该类反应目前受到了许多关注,并在农药、药物和材料领域得到了广泛应用^([1]).在过去的几十年中,碳-碳单键和碳-碳双键的裂解反应已经得到了深入的研究与发展^([1... 详细信息

碳-碳键的裂解反应作为一种有用的合成工具可用于构建许多有价值的化合物,该类反应目前受到了许多关注,并在农药、药物和材料领域得到了广泛应用^([1]).在过去的几十年中,碳-碳单键和碳-碳双键的裂解反应已经得到了深入的研究与发展^([1-2]).然而,由于碳-碳叁键的键能很大,其裂解反应发展较缓慢,目前仍然是有机化学领域中最具挑战性的课题之一.

关键词：有机化学裂解反应酯化反应电化学炔烃叁键二醇