UMPOLUNG

作品数：13被引量：5H指数：1
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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>>
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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 
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 
Enantioselective synthesis of mixed 3,3’-bisindoles via a phosphine-catalyzed umpolung γ-addition of 3’-indolyl-3-oxindoles to allenoates被引量：1
《Science Bulletin》2020年第7期557-563,M0004,共8页Yildiz Tasdan Guang-Jian Mei Yixin Lu 
Yixin Lu thanks the Singapore National Research Foundation,Prime Minister’s Office for the NRF Investigatorship Award(R-143-000-A15-281);Financial supports from the National University of Singapore(R-143-000-695-114 and C-141-000-092-001);the National Natural Science Foundation of China(21672158)are also gratefully acknowledged.
An enantioselective umpolung γ-addition reaction of 3’-indolyl-3-oxindoles to allenoates catalyzed by amino acid-derived bifunctional phosphine catalysts has been developed. A wide range of chiral mixed 3,3’-bisind...
关键词：Umpolung c-addition Amino acid-derived bifunctional phosphine ALLENOATES Mixed 3 30-Bisindole Formal total syntheses 
Predictable site-selective radical fluorination of tertiary ethers被引量：2
《Science China Chemistry》2020年第2期187-191,共5页Junyang Ma Wentao Xu Jin Xie 
supported by the National Natural Science Foundation of China(21971108,21702098);the Natural Science Foundation of Jiangsu Province(BK20190006);Fundamental Research Funds for the Central Universities(020514380176);“Jiangsu Six Peak Talent Project”;“1000-Youth Talents Plan’’;start-up funds from Nanjing University;supported by the Scientific Research Foundation of Graduate School of Nanjing University(2018CL05)
In this communication,we disclose the first example of metal-free and site-selective radical fluorination of readily available tertiary alkyl ethers,enabled by synergistic photocatalysis and organocatalysis.This catal...
关键词：cooperative catalysis C–O bond activation radical fluorination polarity-matching effect UMPOLUNG 
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