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| 1 | Arenesulfonyl Fluoride Synthesis via Copper-free Sandmeyer-type Fluorosulfonylation of Arenediazonium Salts显示文摘Summary of main observation and conclusion The limited availability of highly valuable arenesulfonyI fluorides seriously hinders their further applica-tion in many research fields including medicinal chemistry and chemical biological,organic synthesis,polymer preparation,etc.We report herein a mild and eficient copper-fre Sandmeyer-type fluorosulfonylation reaction of various arenediazonium salts to prepare valuable arenesulfonyl fluorides using KxS2Os as both a reductant and a practical sulfonyl source in combination with N-fluorobenzenesulfonimide as an effective fluorine source.This method-ology provides an attractive route to diverse important arenesulfonyl fluorides given the overall practicality and scope. | Qiongzhen Lin Zhanhu Ma Changge Zheng Xiao-Jun Hu Yong Guo Qing-Yun Chen Chao Liu | 2020 | Chinese Journal of Chemistry2020，38，10： | 2 |
| 2 | Comparative Study on Microstructure and Mechanical Properties of Coarse-grained WC-based Cemented Carbides Sintered with Ultrafine WC or (W+C) as Additives显示文摘The effects of ultrafine WC(WC_(UF),0.5μm) or W(1μm) and C(0.3μm)(W+C)_(UF) additives on the densification,microstructure and mechanical properties of coarse-grained cemented carbides were compared systematically.Overall,the cemented carbides with WC_(UF)/(W+C)_(UF) additives are almost fully densification to be higher than 99%,and the average grain size is kept above 2.8μm.The WC_(UF) additive assists grains to(truncated)trigonal prism shape by two dimensional(2D) growth,whereas the(W+C)_(UF) additive assists grains to rounded shape by three dimensional(3D) growth,lowers WC contiguity and increases face-centered-cubic Co.The hardness and bending strength of(75WC_(C)-15WC_(UF))-10Co are 86.6 HRA and 2 272 MPa,respectively,both higher than those of(75WC_(C)-15(W+C)_(UF))-10Co,which could be ascribed to the enhanced densification and unblemished grains.However,the fracture toughness of the(75WC_(C)-15(W+C)_(UF))-10Co is 23.5 MPa·m^(1/2),higher than that of the(75WC_(C)-15WC_(UF))-10Co due to the uniform WC-Co structure and flexible binder phase. | 于淞百 闵凡路 LI De NOUDEM Guillaume Jacques ZHANG Hailong MA Jichang ZHAO Kui YAO Zhanhu 张建峰 | 2024 | Journal of Wuhan University of Technology(Materials Science)2024，39，2： | 0 |
| 3 | Aliphatic sulfonyl fluoride synthesis via reductive decarboxylative fluorosulfonylation of aliphatic carboxylic acid NHPI esters显示文摘Based on a radical sulfur dioxide insertion and fluorination strategy,we have developed an efficient method for aliphatic sulfonyl fluoride synthesis using abundant carboxylic acids,a reductant,a sulfur dioxide surrogate and the electrophilic fluorination reagent N-fluorobenzenesulfonimide(NFSI)under reduction conditions.This protocol provides a convenient synthetic pathway for various aliphatic sulfonyl fluorides and tolerates a wide range of functional groups. | Zhanhu Ma Yongan Liu Xiaoyu Ma Xiaojun Hu Yong Guo Qing-Yun Chen Chao Liu | 2022 | Organic Chemistry Frontiers2022，9，4： | 0 |
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