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Oxidative dual C-H sulfenylation:A strategy for the synthesis of bis(imidazo[1,2-a]pyridin-3-yl)sulfanes under metal-free conditions using sulfur powder

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Chinese Chemical Letters 2021年第5期32卷 1705-1708页

作者： Ziyu Gan Xiaolong Zhu Qiuli Yan xiuyan song Daoshan Yang School of Chemistry and Chemical Engineering Qufu Normal UniversityQufu 273165China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEState Key Laboratory Base of Eco-Chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China

An efficient approach to sulfur-bridged imidazopyridines has been developed under metal-free conditions using inexpensive sulfur powder as the sulfur *** appealingly,the reaction can proceed smoothly without addition of any additives,ultimately decreasing the production of chemical *** inexpensive and green method should provide a useful strategy for constructing a library of novel and biological interesting heteroaromatic sulfides.

关键词： C-S bond Metal-free Sulfur powder Disulfides Heterocycle

An electron donor-acceptor photoactivation strategy for the synthesis of S-aryl dithiocarbamates using thianthrenium salts under mild aqueous micellar conditions

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Chinese Chemical Letters 2023年第11期34卷 124-130页

作者： Hao Xu Xufeng Li Jie Ma Junze Zuo xiuyan song Jian Lv Daoshan Yang Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Zhejiang Wansheng Co. Ltd.Linhai 317000China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084China

An eco-friendly and convenient method is developed herein for the synthesis of S-aryl dithiocarbamates via visible-light-induced SET process of an EDA complex between thianthrenium salt functionalized arenes and dithiocarbamate anions under mild aqueous micellar *** strategy indirectly realizes the method for constructing S-aryl dithiocarbamates through site-selective C−H functionalization of *** importantly,the reaction proceeded smoothly without addition of any photocatalyst,and the by-product thianthrene is recycled in quantity,ultimately minimizing the production of chemical *** protocol provides a promising synthesis candidate for the construction of valuable S-aryl dithiocarbamates,which also opens up a new avenue for micellar photocatalysis.

关键词： S-Aryl dithiocarbamates Visible-light EDA complex Thianthrenium salts Micellar photocatalysis

Annulation Cascades of Cyclosulfonium Salts and Alkenes towards Sulfur-Containing N-Heterocycles by Visible Light/Copper Catalysis

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Chinese Journal of Chemistry 2024年第14期42卷 1637-1643页

作者： Jie Ma Xufeng Li Yuqing Chen Yongjia Shi xiuyan song Jian Lv Daoshan Yang Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdaoShandong266042 China Zhejiang Wansheng Co. Ltd.LinhaiZhejiang317000 China National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass Nanjing Forestry UniversityNanjingJiangsu210037 China

Although,great achievements have been made in the synthesis of heterocycles using radical addition/cyclization strategy,developing versatile alkyl radical precursors,especially the non-stabilized long chain alkyl radicals for this strategy still remains a huge ***,we report an efficient annulation cascade reaction between cyclosulfonium salts and alkenes for the synthesis of sulfur-containing N-heterocycles by visible light/copper catalysis under mild *** C—S bond cleavage/radical cascade reaction delivers a variety of corresponding N-heterocycles containing aryl alkyl thioether motifs with good functional group ***,the current system could be used for the late-stage functionalization of complex bioactive molecules.

关键词： Visible light Radical reactions C-C coupling Sulfur heterocycles Photoredox catalysis

A desulphurization strategy for Sonogashira couplings by visible light/copper catalysis

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Organic Chemistry Frontiers 2022年第2期9卷 386-393页

作者： Xuan Li Min Jiang Xiaolong Zhu xiuyan song Qirong Deng Jian Lv Daoshan Yang Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042P.R.China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084People’s Republic of China College of Materials Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou310036P.R.China

The development of new copper-based catalysts in photoredox transformations has become a rapidly growing area of research and has been actively explored in the past several ***,we have developed a new copper-based catalyst,[(binap)(tpy)Cu]Cl,and applied it in the visible-light promoted Sonogashira coupling *** mild protocol results in various substituted alkynes from simple sulfonium salts which can be easily prepared from commercially available and inexpensive thiols,alcohols,and alkyl *** study will broaden the still limited strategies of copper photocatalysts in organic transformations.

关键词： copper visible coupling

Rapid formation of Csp^(3)–Csp^(3) bonds through copper-catalyzed decarboxylative Csp^(3)–H functionalization

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Chinese Chemical Letters 2023年第1期34卷 326-332页

作者： Wenwen Cui Yu Li Xufeng Li Junxin Li xiuyan song Jian Lv Yuan-Ye Jiang Daoshan Yang Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China School of Chemistry and Chemical Engineering Qufu Normal UniversityQufu 273165China Zhejiang Wansheng Co. Ltd.Linhai 317000China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084China

Transition-metal-catalyzed decarboxylative and C–H functionalization strategy for the construction of Csp^(2)-Csp^(2),Csp^(2)-Csp,and Csp^(2)-Csp^(3) bonds has been extensively ***,research surveys of this synthetic strategy for the Csp^(3)-Csp^(3) bond forming reactions are surprisingly ***,we present an efficient approach for the rapid formation of Csp^(3)–Csp^(3) bond through copper-catalyzed decarboxylative Csp^(3)–H *** present method should provide a useful access to C3-substituted indole scaffolds with possible biological *** experiments and DFT calculations supported a dual-Cu(Ⅱ)-catalytic cycle involving rate-determining decarboxylation in an outer-sphere radical pathway and spin-crossover-promoted C–C bond *** strategy offers a promising synthesis method for the construction of Csp^(3)–Csp^(3) bond in the field of synthetic and pharmaceutical chemistry and extends the number of still limited copper-catalyzed decarboxylative Csp^(3)–Csp^(3) bond forming reaction.

关键词： Copper Cross-coupling Csp^(3)-H functionaliztion Decarboxylation Csp^(3)–Csp^(3)bond formation

Alkylsulfonium salts for the photochemical desulphurizative functionalization of heteroarenes

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Organic Chemistry Frontiers 2022年第2期9卷 347-355页

作者： Xiaolong Zhu Min Jiang Xuan Li Enjie Zhu Qirong Deng xiuyan song Jian Lv Daoshan Yang Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042P.R.China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084People’s Republic of China College of Materials Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou310036P.R.China

The development of new versatile alkylation reagents that can be transformed from diverse available chemical raw materials is highly ***,an efficient,metal-free organic photoredox-catalyzed direct alkylation of heteroarenes via a desulphurization strategy using alkylsulfonium salts as alkylation reagents under mild conditions has been described for the first *** inexpensive and efficient organic photoredox-catalyzed method offers a new and useful strategy for constructing various biologically interesting heteroarenes in the fields of synthetic and pharmaceutical chemistry,and extends the scope of the still limited sulfonium salt photochemistry.

关键词： salts alkylation sulfo

Anomalous Phase Transformation from Martensite to Austenite in Fe-13%Cr-4%Ni-Mo Martensitic Stainless Steel

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Journal of Materials Science & Technology 2010年第9期26卷 823-826页

作者： Yuanyuan song,xiuyan Li,Lijian Rong and Yiyi Li Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The thermal stability of the reversed austenite in a low carbon Fe-13%Cr-4%Ni-Mo（in wt pct） martensitic stainless steel was investigated by X-ray diffraction（XRD） and superconducting quantum interference device（SQUID） *** amount of the reversed austenite was obtained by controlling tempered *** was found that the amount of the reversed austenite increased after keeping the specimens at liquid nitrogen temperature for 72 *** mechanism of the anomalous phase transformation from martensite to austenite was discussed.

关键词： Low temperature Martensite Austenite Phase transformation Magnetization vs temperature

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对欠发达地区构建社会主义和谐社会的思考

理论前沿 2005年第7期 5-6页

作者：宋秀岩青海省人民政府

结合青海省经济、社会发展实际,提出在欠发达地区构建社会主义和谐社会必须更加注重解决突出存在的六大问题。

关键词：欠发达地区和谐社会突出问题

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基于离子液体的聚合物材料化学解聚研究进展

高分子材料科学与工程 2017年第1期33卷 186-190页

作者：王婵宋修艳刘福胜青岛科技大学化工学院山东青岛266042

综述了近年来离子液体环境下高聚物材料化学降解回收相应产品的研究现状,重点介绍了聚碳酸酯(PC)、聚对苯二甲酸乙二醇酯(PET)、聚β-羟基丁酸酯(PHB)、聚乳酸(PLA)、尼龙6(PA6)及聚乙烯(PE)等材料在离子液体环境下的化学降解方法,同时... 详细信息

综述了近年来离子液体环境下高聚物材料化学降解回收相应产品的研究现状,重点介绍了聚碳酸酯(PC)、聚对苯二甲酸乙二醇酯(PET)、聚β-羟基丁酸酯(PHB)、聚乳酸(PLA)、尼龙6(PA6)及聚乙烯(PE)等材料在离子液体环境下的化学降解方法,同时分析了各种方法的优缺点。最后对离子液体用于聚合物化学降解行为的发展前景进行了展望。

关键词：离子液体聚合物材料化学解聚