云南高校图书馆联盟文献共享服务平台- UMPOLUNG

UMPOLUNG: 作品数：13被引量：5H指数：1; 导出分析报告; 相关领域：理学更多>>; 相关机构：华中师范大学更多>>; 相关期刊：《Science Bulletin》《Chinese Journal of Catalysis》《Chinese Journal of Chemistry》《Organic Chemistry Frontiers》更多>>; 相关基金：国家自然科学基金中央高校基本科研业务费专项资金中国博士后科学基金国家重点基础研究发展计划更多>>

Visible Light-Induced Umpolung Synthesis of 3,3-Disubstituted Oxindoles via the Substrate-Photosensitive Strategy: 《Chinese Journal of Chemistry》2025年第4期431-436,共6页Jingjing Yang Tingting Wang Benhui Sui Hongyu Wang Bo Tang; support from the National Natural Science Foundation of China(22377113,21927811,22134004);the Taishan Scholar Program of Shandong Province(tsqn202306103);the Fundamental Research Funds for the Central Universities(Ocean University of China)is greatly appreciated.; 3,3-Disubstituted oxindoles,forming the core of extensive bioactive natural products and drugs,attract tremendous efforts to develop efficient methods for their preparation.Here,a photocatalyst-free approach for the s...; 关键词：Umpolung synthesis Photocatalysis α-Amino radical Isatin-derived imines 3-Substituted 3-aminooxindoles

Rhodium-Catalyzed N-Arylation Addition of Arylboronic Acids to Ketimines: 《Chinese Journal of Chemistry》2024年第18期2243-2248,共6页Xue-Wei Qian Xing-Wen Sun; financial support from the Natural Science Foundation of Shanghai(20zR1405500).; Herein,we report rhodium catalyzed N-arylation via addition of arylboronic acids to electron-deficientα-iminoesters which can be prepared in high efficiency by using easily accessible B-carbonyl esters.The reaction i...; 关键词：Rhodium catalyzed N-Arylation addition Amines UMPOLUNG INDOLE C-C coupling

Chemodivergent Synthesis of Benzofurans and 2,3-Dihydrobenzofurans via Tandem Oxidative Annulation of Enaminones and Salicylaldehydes: 《Chinese Journal of Chemistry》2024年第15期1727-1733,共7页Xiyan Duan Hui Li Junqi Wang Kun Liu Meixin Shi Weidong Lian Ran Chen Pu Liu; the Science and Technology Foundation of Henan Province(222102310580);Innovation and Entrepreneurship Training Program for College Students;Henan University of Science and Technology(2023180).; Chemodivergent synthesis of benzofurans and 2,3-dihydrobenzofurans has been realized.Under a reaction system consisting of DBDMH and K_(2)CO_(3) as promotors,controlled conditions enabled the formation of two sets of ...; 关键词：Cross-coupling UMPOLUNG Domino reactions ENAMINONE BENZOFURANS 2 3-Dihydrobenzofurans

Bioinspired zinc-mediated umpolung thiolation of alkyl electrophiles: reaction development, scope and mechanism: 《Science China Chemistry》2024年第3期898-907,共10页Yuenian Xu Yan Zhang Yong Liu Wen-Wu Sun Jie Huang Hui He Yingjie Wu Wen Liu Shao-Fei Ni Xu-Qiong Xiao Xinxin Shao; the National Science Foundation of China(22001051);Zhejiang Provincial Natural Science Foundation of China(LY23B020002)for financial support;funding from the STU Scientific Research Foundation for Talents(NTF20022)。; Zinc-promoted umpolung thiolation of alkyl electrophiles with masked sulfur transfer reagents in the absence of nickel or copper catalysis is described. This protocol proceeds via a SET process of Zn to electrophilic ...; 关键词：umpolung thiolation C(sp^(3))-S bond formation masked sulfur reagents reductive coupling

Nickel-catalyzed umpolung C-S radical reductive cross coupling of S-(trifluoromethyl)arylsulfonothioates with alkyl halides: 《Chinese Chemical Letters》2023年第11期137-142,共6页Yu-Zhong Yang Gui-Fen Lv Ming Hu Yang Li Jin-Heng Li; the National Natural Science Foundation of China(No.22271245);the Jiangxi Province Science and Technology Project(Nos.20212AEI91002 and 20202ACBL213002);the Open Research Fund of School of Chemistry and Chemical Engineering,Henan Normal University(No.2021ZD01)for financial support.; A new cooperative nickel reductive catalysis and N,N-dimethylformamide-mediated strategy for umpolung C–S radical reductive cross coupling of S-(trifluoromethyl)arylsulfonothioates with alkyl halides to produce alkyl...; 关键词：Nickel RADICAL Reductive cross coupling S-(Trifluoromethyl)arylsulfonothioates Alkyl halides Alkyl aryl thioethers

Palladium-catalyzed allylic alkylation enabled by ketone umpolung via Pudovik addition/[1,2]-phospha-Brook rearrangement: 《Science China Chemistry》2023年第10期2810-2816,共7页Jian Zhang Jia-Yi Su Yang-Zi Liu Hao Li Quannan Wang Wei-Ping Deng; supported by the National Key Research and Development Program of China(2021YFA0804900);the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang(2022R01007);Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism。; Palladium-catalyzed allylic alkylation enabled by ketone umpolung via Pudovik addition/[1,2]-phospha-Brook rearrangement with phosphites has been developed.The protocol offers a straightforward method for the synthesi...; 关键词：PALLADIUM UMPOLUNG allylic alkylation Pudovik addition [1 2]-phospha-Brook rearrangement

Electrochemical Umpolung Enabled Radical-Radical Cross-Coupling Between Electron-Deficient Methylarenes and Aldehydes被引量：1: 《CCS Chemistry》2023年第9期1973-1981,共9页Fei Lian Kun Xu Chengchu Zeng; the National Natural Science Foundation of China(grant nos.22271009 and 22171015);Beijing Natural Science Foundation(grant no.2222003);Beijing Municipal Education Committee Project(grant nos.KZ202110005003 and KM202110005006).; The electrochemical utilization of electron-deficient methylarenes for radical-radical cross-couplings remains very rare.Enabled by an umpolung strategy,the unprecedented electrochemical cross-coupling of electron-def...; 关键词：paired electrolysis ketyl radical UMPOLUNG radical-radical cross-coupling methylarene ALDEHYDE

Regioselective umpolung addition of dicyanobenzene to α,β-unsaturated alkenes enabled by electrochemical reduction被引量：1: 《Organic Chemistry Frontiers》2022年第5期1261-1266,共6页Sheng Zhang Wenchao Gao Jianxue Shi Jingjing Li Fengyi Li Yating Liang Xuan Zhan Man-Bo Li; We are grateful to the National Natural Science Foundation of China(21702113 and 92061110);Anhui University(S020318006/069 and S020118002/113)for their financial support.; An umpolung addition of dicyanobenzene toα,β-unsaturated alkenes has been developed using an elec-troreductive strategy.This electrochemical protocol is well compatible with a broad range of convention-ally challeng...; 关键词：UNSATURATED BENZENE electrochemical

Allylation and alkylation of oxindoleketimines via imine umpolung strategy: 《Chinese Chemical Letters》2021年第7期2313-2316,共4页Mei-Hua Shen Chen Li Qing-Song Xu Bin Guo Rui Wang Xiaoqian Liu Hua-Dong Xu Defeng Xu; the National Natural Science Foundation of China(No.21672027)for financial support;supported by High-Level Entrepreneurial Talent Team of Jiangsu Province(No.2017-37)。; When treated with an alkoxide base like t-BuOK in aprotic solvent,N-di phenyl methyl imino oxindoles,made conveniently through condensation of corresponding isatins with N-di phenyl methyl amine,are deprotonated to fo...; 关键词：ALLYLATION ALKYLATION Azaallylaion UMPOLUNG Oxindleketamine Spiro oxindole

Rhodium(Ⅲ)-catalyzed chelation-assisted C-H imidation of arenes via umpolung of the imidating reagent: 《Chinese Journal of Catalysis》2020年第11期1723-1733,共11页Guangfan Zheng Jiaqiong Sun Youwei Xu Xukai Zhou Hui Gao Xingwei Li; 国家自然科学基金(21525208);中国博士后基金(2019TQ0192,2019M653531,2019M663613);中央高校基本科研业务费专项资金(GK201903028);陕西师范大学.; Rh(Ⅲ)-catalyzed, chelation-assisted oxidative C-H imidation of arenes with N-H imide have been realized using PhI(OAc)2 as an oxidant. This transformation exhibits a broad substrate scope and tolerates various functi...; 关键词：Aryl amines Rh(Ⅲ)catalysis Oxidative C-H imidation Hypervalent iodine regent UMPOLUNG

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