DIFLUOROMETHYLENE

作品数：10被引量：12H指数：2
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相关领域：理学更多>>
相关机构：上海大学更多>>
相关期刊：《Science China Chemistry》《Chinese Journal of Chemistry》《Chinese Chemical Letters》更多>>
相关基金：国家自然科学基金国家重点基础研究发展计划广东省自然科学基金更多>>
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Efficient capture of difluorocarbene by pyridinium 1,4-zwitterionic thiolates:A concise synthesis of difluoromethylene-containing 1,4-thiazine derivatives
《Chinese Chemical Letters》2024年第4期367-370,共4页Zhiwei Chen Heyun Sheng Xue Li Menghan Chen Xin Li Qiuling Song 
Financial support from National Natural Science Foundation of China(Nos.21931013 and 22271105);Natural Science Foundation of Fujian Province(No.2022J02009);Open Research Fund of School of Chemistry and Chemical Engineering,Henan Normal University;the Instrumental Analysis Center of Huaqiao University for analysis support;the Subsidized Project for Cultivating Postgraduates’Innovative Ability in Scientific Research of Huaqiao University。
A practical method for the construction of difluoromethylene-containing 1,4-thiazine moieties using readily available diethyl bromodifluoromethanephosphonate(BrCF_(2)PO(OEt)_(2))as difluorocarbene precusor has been de...
关键词：DIFLUOROMETHYLENE Pyridinium 1 4-zwitterionic thiolates 1 4-Thiazine derivatives 
Photocatalyzed[2+1]cyclization of alkenes and silylated trifluorodiazoethanes:facile entry into(difluoromethylene)cyclopropanes被引量：1
《Science China Chemistry》2023年第11期3141-3147,共7页Suo Chen Yizhi Zhang Shanshan Liu Xiao Shen 
supported by the National Key Research and Development Program of China(2022YFA1506100);Shenzhen Science and Technology Program(JCYJ20220818100604009);Guangdong Basic and Applied Basic Research Foundation(2021A1515010105,2023A1515010601)。
Methylenecyclopropanes are among the most robust building blocks in synthetic chemistry,but the study on(difluoromethylene)-cyclopropanes is rather limited,because of the difficulty in the synthesis of these compounds...
关键词：triplet carbene CYCLOPROPANATION METHYLENECYCLOPROPANES (difluoromethylene)cyclopropanes 
Regiocontrolled Rh(Ⅲ)-catalyzed C-C coupling/C-N cyclization mediated by distinctive 1,2-migratory insertion of gem-difluoromethylene allenes:Reaction development and mechanistic insight
《Chinese Chemical Letters》2023年第5期250-255,共6页Zhi Zhou Kaifeng Chen Yi Wang Xiuhua Zhong Shuang Lin Hui Gao Wei Yi 
the National Natural Science Foundation of China(NSFC,Nos.21877020,22007020);Natural Science Foundation of Guangdong Province(No.2019A1515010935);Science and Technology Program of Guangzhou(No.202102020615)for financial support on this study。
By developing gem-difluoromethylene allenes as viable partners,regiocontrolled Rh(Ⅲ)-catalyzed redoxneutral C-C coupling/C-N cyclization has been realized to build the pyridin-2(1H)-one motifs with the embedment of a...
关键词：Gem-difluoromethylene allenes C-H functionalization REGIOCONTROL Rhodium(Ⅲ)catalysis DFT calculations 
Metal-free regioselective construction of 2-aryl-2H-tetrazol-5-yl difluoromethylene phosphonates被引量：1
《Chinese Chemical Letters》2022年第2期863-866,共4页Shi-Jing Zhai Dominique Cahard Fa-Guang Zhang Jun-An Ma 
supported by the National Natural Science Foundation of China (Nos.21772142,21901181 and 21961142015);the National Key Research and Development Program of China (No.2019YFA0905100);Tianjin Municipal Science & Technology Commission (No.19JCQNJC04700);the CNRS in France。
Three bench-stable difluoromethylene phosphonate hydrazones were prepared from simple diethyl(difluoromethyl)phosphonate within two steps in good yields. The [3 + 2] cycloaddition reaction of these diazo precursors wi...
关键词：TETRAZOLE Cycloaddition Difluoromethylene phosphonate Regioselectivity Diazonium salt 
Base-Promoted Formylation and N-Difluoromethylation of Azaindoles with Ethyl Bromodifluoroacetate as a Carbon Source
《Chinese Journal of Chemistry》2021年第6期1477-1482,共6页Yang Li Ning Sun Cai-Lin Zhang Meng Hao 
the financial support from the National Natural Science Foundation of China(No.21503161);the Key Research&Development Project in Shaanxi Province(No.2017ZDXM-GY-040);the Doctoral Scientific Research Foundation of Xi'an Polytechnic University(No.107020336).
We reported for the first time that ethyl bromodifluoroacetate directly reacts with azaindole without transition metal catalysis to produce a difluoromethyl protected 5-aldehyde group product in one step.It is worth m...
关键词：AZAINDOLES C1 building blocks DIFLUOROMETHYLENE Hydrolysis Synthetic methods 
Cu（I）-Catalyzed Three-Component Coupling of Trifluoromethyl Ketone N-Tosylhydrazones, Alkynes and Azides： Synthesis of Difluoromethylene Substituted 1,2,3-Triazoles被引量：5
《Chinese Journal of Chemistry》2017年第4期387-391,共5页Zhikun Zhang Qi Zhou Weizhi Yu Tianjiao Li Yan Zhang Jianbo Wang 
A Cul-catalyzed three-component coupling of trifluoromethyl ketone N-tosylhydrazones, alkynes and azides has been developed. The reaction represents a straightforward method to access difluoromethylene substituted 1,2...
关键词：Cu（I）-catalysis metal carbene migratory insertion β-fluoride elimination triazole 
Synthesis of difluoroalkyl-γ-butyrolactones from iododifluoromethyl ketones and 4-pentenoic acids被引量：1
《Chinese Chemical Letters》2015年第11期1381-1384,共4页Jie-Xiong Wang Jing-Jing Wu Heng Chen Shao-Wu Zhang Fan-Hong Wu 
financial supports from the National Natural Science Foundation of China(Nos.21472126,21172148,21302128)
A convenient and efficient approach for difluoroalkyl-containing γ-hutyrolactones via the radical addition reaction of iododifluoromethyl ketones with 4-pentenoic acids initiated by AIBN in CH3CN at 60 ℃ was reporte...
关键词：γ-ButyrolactonesDifluoromethyleneFluorine-containing lactoneRadical reaction 
Design and concise synthesis of gem-difluoromethylenated analogue of 7-epi-castanospermine被引量：3
《Chinese Chemical Letters》2014年第8期1115-1120,共6页Xin-Yi Jiang Xiu-Hua Xu Feng-Ling Qing 
the National Natural Science Foundation of China (Nos. 21272036, 21332010);the National Basic Research Program of China (No. 2012CB21600)
A novel gem-difluoromethylenated castanospermine analogue B was designed and synthesized, starting from 3-bromo-3,3-difluoropropene and L-（-）-malic acid. The key steps involve substitution cyclization reaction and R...
关键词：lndolizidine CASTANOSPERMINE gem-Difluoromethylene CYCLIZATION DIHYDROXYLATION 
Cu-Promoted Oxidative Trifluoromethylation of Terminal Alkynes with Difluoromethylene Phosphobetaine被引量：1
《Chinese Journal of Chemistry》2014年第8期689-693,共5页Xiaoyun Deng Jinhong Lin Jian Zheng Jichang Xiao 
The authors thank the National Natural Science Foundation of China(NSFC)(Nos.21032006,21172240);the 973 Program of China(No.2012CBA01200);the Chinese Academy of Sciences for financial support.
Difluoromethylene phosphobetaine(Ph_(3)P^(+)CF_(2)CO_(2)^(-),PDFA),a known difluorocarbene reagent,was found to be able to efficiently trifluoromethylate terminal alkynes in the presence of Cu(I)and potassium fluoride...
关键词：COPPER difluoromethylene phosphobetaine TRIFLUOROMETHYLATION ALKYNES DIFLUOROCARBENE 
Convenient synthesis of β-allenic α-difluoromethylenephosphonic acid monoesters:Potential synthons for cyclic phosphate mimics
《Chinese Chemical Letters》2007年第1期33-36,共4页Yun Lin Jin Tao Liu 
We thank the National Natural Science Foundation of China for financial support(No.20572124).
β-Allenic α-difluoromethylenephosphonic acid monoesters were prepared under mild conditions for the first time by hydrolyzing the corresponding diethyl phosphonates in aqueous sodium hydroxide solution.
关键词：β-Allenic α-difluoromethylenephosphonic acid monoester Hydrolysis Phosphate mimic 
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