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Chinese Journal of Chemistry 2023年第21期41卷 2819-2824页

作者： Min Zhang Qiang Li jin-Hong Lin ji-chang xiao Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling RoadShanghai200032 China Department of Chemistry Innovative Drug Research CenterShanghai UniversityShanghai200444 China

Due to its unique electronic properties,the difluoromethylene group(CF2)has served as a valuable unity in the design of biologically active ***γ-lactones display a broad range of biological properties,α,α-difluoro-γ-lactones may exhibit unexpected biological activities,and thus their synthesis has received increasing *** synthetic methods suffer from tedious multi-step processes,and very few effective methods have been reported ***,we describe the difunctionalization of alkenes with BrCF_(2)CO_(2)K under photoredox catalysis with the use of a boron-Lewis acid for the access toα,α-difluoro-γ-*** this transformation,the alkene substrates and the used reagents,including BrCF_(2)CO_(2)K and the boron-Lewis acid,PhB(OH)2 or BF3·THF,are cheap and widely *** efficiency and atom economy may make this protocol attractive.

关键词： Photoredox Catalysis Fluorine Lactones Alkenes

Direct N-gem-difluorocyclopropylation of nitro-heterocycles by utilizing gem-difluorocyclopropyl tosylate

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Chinese Chemical Letters 2014年第1期25卷 24-28页

作者： Wei-Peng Gu jin-Hong Lin ji-chang xiao Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences

We have developed an efficient method to achieve N-gem-difluorocyclopropylation of N-heterocycles with the use of gem-difluorocyclopropyl tosylate as a building block under mild conditions, gem- Difluorocyclopropyl to... 详细信息

关键词： N-gem-Difluorocyclopropylation N-Heterocycles gem-Difluoracyclopropyl tosylate Building block

Dehydroxylative Trifluoromethylthiolation, Trifluoromethylation, and Difluoromethylation of Alcohols

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Chinese Journal of Chemistry 2020年第2期38卷 169-172页

作者： Wei Zhang jin-Hong Lin Wenfeng Wu Yu-Cai Cao ji-chang xiao Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling RoadShanghai 200032China College of Chemistry and Materials Engineering Guiyang University103 Jianlongdong RoadNanming DistrictGuiyangGuizhou 550005China State Key Laboratory of Polyolefins and Catalysis Shanghai Key Laboratory of Catalysis Technology for PolyolefinsShanghai Research Institute of Chemical Industry Co.Ltd.Shanghai 200062China

Summary of main observation and conclusion CF3S,CF3 and HCF2 groups have been identified as valuable functionalities for drug *** significant accomplishments in the trifluoromethylthiolation,trifluoromethylation and d讦luoromethylation reactions,directly converting common functional groups into CF3S,CF3 or HCF2 groups is still highly desirable.

关键词： accomplishment hydroxyl conclusion

Ph_3P^+CF_2CO_2^- as an F^- and:CF_2 source for trifluoromethylthiolation of alkyl halides

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Chinese Chemical Letters 2019年第3期30卷 714-716页

作者： Zhuo Liu jin Long Xuan xiao jin-Hong Lin Xing Zheng ji-chang xiao Yu-Cai Cao Institute of Pharmacy and Pharmacology Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study University of South China Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences Shanghai Research Institute of Chemical Industry Co. LTD.

As trifluoromethylthiolation has received increasing attention recently, many CF_3S-reagents and trifluoromethylthiolation methods have been developed. Herein we describe trifluoromethylthiolation of alkyl halides by using Ph_3 P^+CF_2CO_2 as a fluoride and difluorocarbene source. Difluorocarbene is a versatile intermediate, but its side reactions are usually ignored and the by-products would therefore be discarded. In this work, a side reaction of difluorocarbene, the generation of a fluoride anion from difluorocarbene, was developed into a synthetic tool. Although the trifluoromethylthiolation reaction involved multi-sequential steps, the cleavage of C-F bond, the formation of CF_2=S bond, F-C(S)F_2 bond,and C-SCF_3 bond, the conversion proceeded fast and was completed within 10 min.

关键词： Difluorocarbene Trifluoromethylthiolation Alkyl halides Thiocarbonyl fluoride Fluorine

Pd-Catalyzed Transfer of Difluorocarbene for Three Component Cross-Coupling

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Chinese Journal of Chemistry 2020年第12期38卷 1647-1650页

作者： Zhi-Wei Xu Wei Zhang jin-Hong Lin Chuan-Ming jin ji-chang xiao Hubei Key Laboratory of Pollutant Analysis and Reuse Technology College of Chemistry and Chemical EngineeringHubei Normal UniversityHuangshiHubei 435002China Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling RoadShanghai 200032China

Summary of main observation and conclusion Outstanding accomplishments have been achieved in the chemistry of difluorocarbene,but transitionmetal-catalyzed transfer of difluorocarbene for coupling remains a challenging ***,we describe a Pd-catalyzed coupling of difluorocarbene with two aryl carbon centers to give difluoromethylenation products,which cannot be obtained by any previous difluorocarbene-transformation method.

关键词： method. carbene catalyzed

Direct Trifluoromethylthiolation of Unactivated C(sp3)-H Using Silver(Ⅰ) Trifluoromethanethiolate and Potassium Persulfate

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Direct Trifluoromethylthiolation of Unactivated C(sp3)-H Usi...

Primary Studies on Burnup Estimation of Irradiated Uranium by Dtermining 236U/238U in Contaminated Environmental Samples jiANG xiao-yan,ZHANG ji-long,ZOU Wei,chang Zhi-yuan

中国化学会第十四届全国氟化学会议

作者： Hao Wu Zhiwei xiao Junhui Wu Yong Guo ji-chang xiao Chao Liu Qing-Yun Chen Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences

Since trifluoromethylthio group(CF3S)can significantly influence and tune the chemical,physical and biological properties of the parent substrate due to its strong electronegativity and high lipophilicity,considerable...

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Primary Studies on Burnup Estimation of Irradiated Uranium b...

作者： jiANG xiao-yan ZHANG ji-long ZOU Wei chang Zhi-yuan

U/U of the environmental sample can indicate the existence of uranium irradiation,and even can be uesd to estimate the burnup of nuclear spent fuel.A study on the burnup estimation of irradiated uranium which was mixed with natural uranium was carried out by measuring the U/U and U/U in the samples by using MC-ICP-MS. According to the equation(1) and(2),a programme for calculating the burnup of the irradiated

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取代率和混凝土强度对组合梁受弯性能的影响

沈阳工业大学学报 2017年第2期39卷 198-204页

作者：许伟王继忠常晓波白杨沈阳建筑大学土木工程学院沈阳110168

为了研究再生骨料取代率和再生混凝土强度对组合梁单调荷载作用下受弯性能的影响,基于有限元模拟软件ABAQUS对型钢-再生混凝土组合梁受弯性能进行了模拟研究.结果表明,随着再生混凝土强度等级的提高,组合梁的承载力提高,交接面滑移降低... 详细信息

为了研究再生骨料取代率和再生混凝土强度对组合梁单调荷载作用下受弯性能的影响,基于有限元模拟软件ABAQUS对型钢-再生混凝土组合梁受弯性能进行了模拟研究.结果表明,随着再生混凝土强度等级的提高,组合梁的承载力提高,交接面滑移降低.随着再生骨料取代率的提高,组合梁的极限荷载呈下降趋势.取代率在50%以下时,随着取代率的增加,交接面滑移量降低.取代率提高到70%时,交接面滑移出现回升趋势.型钢-再生混凝土组合梁具有较好的受弯性能.

关键词：再生混凝土组合梁取代率交接面滑移单调荷载挠度受弯性能有限元模拟

Copper-Mediated Trifluoromethylation of Heteroaromatic Compound by Trifluoromethyl Sulfonium Salts

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Copper-Mediated Trifluoromethylation of Heteroaromatic Compo...

黄皮种质资源果实性状多样性分析及其数量分类研究

氟化学与美好生活——中国化学会第十一届全国氟化学会议

作者： Cheng-Pan Zhang and ji-chang xiao~* Key Laboratory of Organofluorine Chemistry,Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences,345 Lingling Road,Shanghai,China,

＜正＞S-（fluoroalkyl）-diphenylsulfonium salts have been successfully synthesized in the reaction between fluoroalkylsulfinates and triflic anhydride in dichloromethane through a one pot *** S-（fluoroalkyl）-dipheny...

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园艺学报 2016年第10期43卷 1903-1915页

作者：陆育生林志雄邱继水常晓晓潘建平广东省农业科学院果树研究所农业部南亚热带果树生物学及遗传资源利用重点实验室广东省热带亚热带果树研究重点实验室广州510640

为深入了解黄皮(Clausena lansium)种质资源果实性状的多样性,根据《黄皮种质资源描述规范和数据标准》,对农业部广州黄皮种质资源圃中保存的96份黄皮种质果实性状进行观测,并结合Q型聚类、R型聚类和主成分分析等方法开展数量分类研究... 详细信息

为深入了解黄皮(Clausena lansium)种质资源果实性状的多样性,根据《黄皮种质资源描述规范和数据标准》,对农业部广州黄皮种质资源圃中保存的96份黄皮种质果实性状进行观测,并结合Q型聚类、R型聚类和主成分分析等方法开展数量分类研究。结果表明,22个描述型性状,平均每个性状的变异类型达3.4个,其中种子形状的变异类型最为丰富,为6个。16个数量性状中,穗粒数的变异系数最大,为58.78%;种子侧径的变异系数最小,为6.34%。Q型聚类分析将96份种质在欧氏距离19.84处分为4个类群,类群内的种质资源以果穗性状、果实大小和果实风味聚类;R型聚类分析将38个果实性状在相关系数1.45时分为4组,多数性状表现两两相关;主成分分析结果表明,第1、第2主成分解释的总变异为28.16%,其分析结果与聚类分析基本一致。

关键词：黄皮种质资源果实性状多样性数量分类