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Science China Chemistry 2021年第8期64卷 1372-1379页

作者： Jie Liu Haonan Xiang Lvqi Jiang wenbin yi School of Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China Key Laboratory of Organofluorine Chemistry Shanghai Institute Organic ChemistryChinese Academy of SciencesShanghai200032China

Herein,a method for synthesizing various alkyl trifluoromethyl and alkyl bromodifluoromethyl ethers using carbonofluoridothioates(R-OC(=S)F)as precursors has been *** were obtained upon the reaction of an alcohol and S=CF_(2) generated via the decomposition of an SCF_(3) anion,and then selectively transformed into their corresponding trifluoromethyl and bromodifluoromethyl ethers upon changing the reaction *** transformation has also been extended to the one-pot,two-step conversion of alcohols into alkyl trifluoromethyl ethers.A series of alkyl bromodifluoromethyl ethers has also been *** compounds open up a new avenue for the synthesis of a wide range of useful fluorinated *** addition,this method is suitable for the late-stage introduction of trifluoromethyl ethers in complex small molecules.

关键词： carbonofluoridothioates trifluoromethyl ethers bromodifluoromethyl ethers fluorination alkyl

Photocatalyzed ditrifluoromethylthiolation of alkenes with CF_(3)SO_(2)Na

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Science China Chemistry 2024年第2期67卷 587-594页

作者： Fangming Chen Lvqi Jiang Chunyang Hu Jie Liu wenbin yi School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China Key Laboratory of Organofluorine Chemistry Shanghai Institute Organic ChemistryChinese Academy of SciencesShanghai200032China

Since the first report of sodium trifluoromethanesulfinate(CF_(3)SO_(2)Na) as an electrophilic trifluoromethylthiolation reagent in 2015,there has been no breakthrough in research in this ***,we disclose an unprecedented usage of CF_(3)SO_(2)Na as a radical trifluoromethylthiolation reagent.A photocatalyzed ditrifluoromethylthiolation of alkenes with CF_(3)SO_(2)Na in the presence of PPh_(3) and catalytic copper has been ***,either Ir[(p-Fppy)_(2)(bpy)]PF_6 or Ir(ppy)_(3) could facilitate this *** studies indicate that initiation of the radical chain proceeded via two different photocatalytic quenching *** protocol provides a practical method for the construction of diverse vicinal ditrifluoromethylthiolated compounds.

关键词： trifluoromethylthiolation photocatalysis radical difunctionalization alkenes

Lignin-derived Zn single atom/N-codoped porous carbon forα-alkylation of aromatic ketones with alcohols via borrowing hydrogen strategy

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Nano Research 2022年第3期15卷 1874-1881页

作者： Xueping Zhang Guo-Ping Lu Kun Wang Yamei Lin Pengcheng Wang wenbin yi School of Chemistry and Chemical Engineering Nanjing University of Science&TechnologyXiaolingwei 200Nanjing 210094China School of Pharmaceutical Sciences Wenzhou Medical CollegeUniversity TownChashanWenzhou 325035China School of Food Science and Pharmaceutical Engineering Nanjing Normal UniversityWenyuanstreet 200Nanjing 210032China

A green and scalable strategy has been developed for the synthesis of lignin-derived Zn single atom/N-codoped porous carbon(LCN@Zn-SAC)containing similar ZnNx sites with carbonic *** catalyst exhibits superior activity on theα-alkylation of ketones with alcohols via borrowing hydrogen strategy(TON up to 15 h^(−1))than most of previously reported *** dehydrogenation of benzyl alcohol is the rate-determining step based on kinetic experiment *** to experimental and theoretical calculation results,Zn electron density is inversely proportional to reaction energy barriers,because Zn sites with less positive charge(ZnN_(4) and ZnN_(3)C)in Zn-SACs display better borrowing hydrogen ability than other Zn ***,this catalyst can be recycled by simple centrifugation,which can be reused at least 8 runs with no obvious lose in *** the best of our knowledge,this is the first example of non-noble metal-SAC-catalyzedα-alkylation via borrowing hydrogen strategy.

关键词： lignin zinc single atom catalyst N-doped porous carbon α-alkylation borrowing hydrogen

Photocatalyzed Dual-Oxidative Trifluoromethylthio-Trifluoromethylation of Alkenes with CF3SO2Na

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CCS Chemistry 2021年第12期3卷 265-273页

作者： Shuaishuai Liang Jingjing Wei Lvqi Jiang Jie Liu Yasir Mumtaz wenbin yi School of Chemical Engineering Nanjing University of Science and TechnologyNanjingJiangsu 210094 Key Laboratory of Organofluorine Chemistry Shanghai Institute Organic ChemistryChinese Academy of SciencesShanghai 200032

A novel photocatalyzed trifluoromethylthio-trifluoromethylation of alkenes has been developed,using CF_(3)SO_(2)Na as both CF_(3) and SCF_(3) *** photocatalyzed dual-oxidative strategy,which combines two parallel oxidative events,provides a facile method to synthesize a series of vicinal trifluoromethylthio-trifluoromethylated *** reaction is operationally simple,proceeds under mild conditions and exhibits exceptional substrate generality and functional group compatibility.

关键词： trifluoromethyl trifluoromethylthio photochemistry difunctionalization alkene

Fluorinated 1,3-dicarbonyl Compounds:Magical Building-Block for Organic and Medicinal Chemistry

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Fluorinated 1,3-dicarbonyl Compounds:Magical Building-Block ...

CF3SO2-based Reagents for Electrophilic Trifluoromethylthiolation and Chloro-Trifluoromethylthiolation under Reductive Conditions

中国化学会第十四届全国氟化学会议

作者： Zhidong Song wenbin yi School of Chemical Engineering Nanjing University of Science and Technology

Organofluorine chemistry is an active research topic because introduction of fluorine atom（s） could have a significant effect on parent molecules’ chemical, physical, and biological properties. Nucleophilic fluoroalkylation reaction is one of the important methods to introduce fluorinated group into organic molecules. However, the introduction of fluorine poses a negative effect on the thermal stability of many α-fluoro carbon anion and corresponding nucleophilic fluoroalkylation reactions. Our group investigated the fluorinated1,3-dicarbonyl compounds, a new type of fluorine-containing building-block, which participate in some of the fluoroalkylation reactions and applicate in some highly stereoselective and multicomponent reaction systems to obtain some structure which is unable or difficult to obtain directly fluoroalkylation raction. The success on organic and medicinal chemistry of this fluorinated building-block is summarized in an apple tree with many red apples（published work） and green apples（unpublished work）.

关键词： α-fluoro-1,3-dicarbonyl compound fluorinated building-block asymmetric synthesis aromatization

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CF3SO2-based Reagents for Electrophilic Trifluoromethylthiol...

Direct Monofluoromethylthiolation of Aryl Radicals with Bunte Salt CH2FSSO3Na

中国化学会第十五届全国氟化学会议

作者： Lvqi Jiang wenbin yi School of Chemical Engineering Nanjing University of Science and Technology

Trifluoromethanesulfinyl chloride(CFSOCl) is introduced as a new reagent for C-H trifluoromethylthiolation of indoles, thiophenes, and ketones under catalyst-free conditions and in the absence of reductant. The disproportionation of CFSOCl to CFSOCl and CFSCl provides two pathways for the trifluoromethylthiolation.

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Direct Monofluoromethylthiolation of Aryl Radicals with Bunt...

以芳基亚磺酸钠为硫源合成炔硫醚和不对称二硫醚化合物

中国化学会第十五届全国氟化学会议

作者： Fanmin Liu Lvqi Jiang wenbin yi School of Chemical Engineering Nanjing University of Science and Technology

Because of the large size and very low polarising power of the sodium cation, it can stabilize large, aromatic, polarisable radical anions in organic sodium salts. Buntle salt, as a typical organic sodium salt, with its environmentally friendly, stable, and odorless character, has been widely used in the development of sulfides as sulfur sources. Recently, we reported the copper-catalyzed C–S cross-coupling of alkynyl carboxylic acids with Bunte salt. Based on our previous work and continuous research interests in fluorine-containing sodium salts, we decided to disclose a new Bunte salt, sodium S-(fluoromethyl)sulfurothioate, that could be a potential monofluoromethylthiolating reagent. This reagent reacts readily with a variety of aryl radical precursors, such as aryl diazonium salts, aryl triflates and aryl boronic acids.

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有机化学 2018年第5期38卷 1207-1213页

作者：林雅玫易文斌南京理工大学化工学院南京210094

在水相碘/三苯基膦体系中,以无嗅、易操作的芳基亚磺酸钠为硫源,合成了炔硫醚和不对称硫醚化合物.该法相比于其他文献的方法,具有操作简单、无过渡金属参与、无需使用有机溶剂和产率高等优点.

关键词：水相反应芳基亚磺酸钠炔硫醚不对称二硫醚

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International Journal of Geosciences 2013年第2期4卷 329-343页

作者： Hong Tang Adu Gong Shaodan Li wenbin yi Chuanfu Yang CNPC Research Institute of Safety & Environment Technology Beijing China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Beijing China Key Laboratory of Mine Spatial Information Technologies State Bureau of Surveying and Mapping Beijing China

Similarity measurement is one of key operations to retrieve “desired” images from an image database. As a famous psychological similarity measure approach, the Feature Contrast (FC) model is defined as a linear combination of both common and distinct features. In this paper, an adaptive feature contrast (AdaFC) model is proposed to measure similarity between satellite images for image retrieval. In the AdaFC, an adaptive function is used to model a variable role of distinct features in the similarity measurement. Specifically, given some distinct features in a satellite image, e.g., a COAST image, they might play a significant role when the image is compared with an image including different semantics, e.g., a SEA image, and might be trivial when it is compared with a third image including same semantics, e.g., another COAST image. Experimental results on satellite images show that the proposed model can consistently improve similarity retrieval effectiveness of satellite images including multiple geo-objects, for example COAST images.

关键词： Similarity Measurement Feature Contrast Model Set-Theoretic Similarity Image Retrieval

婚姻半径与家庭关系:异地婚姻的形成及其影响——基于一个农民家庭三代婚姻的历史考察

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中国青年研究 2021年第7期 55-61页

作者：易文彬南昌大学中国特色社会主义理论体系研究中心

本文通过考察一个农民家庭三代人的婚姻演变过程,分析经济文化变迁对个体婚姻家庭及其命运的影响,其中异地婚姻对家庭的整合和团结构成极大的挑战。一方面,家庭新老成员之间存在文化、语言和生活习惯的差异,正常沟通存在障碍;另一方面,... 详细信息

本文通过考察一个农民家庭三代人的婚姻演变过程,分析经济文化变迁对个体婚姻家庭及其命运的影响,其中异地婚姻对家庭的整合和团结构成极大的挑战。一方面,家庭新老成员之间存在文化、语言和生活习惯的差异,正常沟通存在障碍;另一方面,新成员远嫁他乡,远离原生家庭,得不到及时的帮扶,缺乏安全感,情绪焦虑不稳定。两个因素交织在一起,容易加剧家庭新老成员之间的隔阂,影响家庭团结。如何解决异地婚姻的家庭融入问题,需要新旧成员之间双方共同努力,学会包容和相互融入。一般情况,开明的家庭,其融合速度快效率好;反之,要么分家,要么解体,对家庭造成伤害。流动时代流动社会,充满活力也充满风险。

关键词：婚姻半径婚姻圈异地婚姻本地婚姻双向融入家庭融入