Metal-Free Direct Intramolecular Carbotrifluoromethylation of Alkenes to Functionalized Trifluoromethyl Azaheterocycles
摘要:
The first example of a metal-free direct carbotrifluoromethylation of alkenes using inexpensive TMSCF3 as the CF3 source is described. The methodology not only exhibits high chemoselectivity for this transformation but also expands the substrate scope that is difficult to access by known transition-metal-catalyzed methods.
Electrochemical trifluoromethylation/cyclization for the synthesis of isoquinoline-1,3-diones and oxindoles
作者:Yuanqiang Guo、Ruiguo Wang、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1039/d1cc03389a
日期:——
reduction to generate trifluoromethyl radicals. The trifluoromethylation reagent (IMDN-SO2CF3) used in this strategy is inexpensive and easy to obtain, and the reaction can be conducted efficiently without the addition of additional redox reagents. Using this strategy, we achieved electrochemical trifluoromethylation/cyclization for the synthesis of isoquinoline-1,3-diones and oxindoles. This protocol
Visible-light induced di- and trifluoromethylation of N-benzamides with fluorinated sulfones for the synthesis of CF<sub>2</sub>H/CF<sub>3</sub>-containing isoquinolinediones
作者:Guanglong Zou、Xuelin Wang
DOI:10.1039/c7ob02226c
日期:——
visible light induced direct difluoromethylation of N-methacryloyl benzamides by using difluoromethyl sulfone was developed. In addition, photoredox-catalyzed trifluoromethylation of N-methacryloyl benzamides with trifluoromethyl sulfone via a similar radical process was also achieved. This method allows for an efficient and practical synthesis of a variety of CF2H/CF3-containing isoquinoline-1,3(2H,4H)-diones
利用二氟甲基砜开发了一种普通的可见光诱导的N-甲基丙烯酰基苯甲酰胺直接二氟甲基化方法。另外,还通过类似的自由基过程,实现了光氧化还原催化的N-甲基丙烯酰基苯甲酰胺与三氟甲基砜的三氟甲基化。该方法允许以中等至良好的产率高效且实用地合成各种含CF 2 H / CF 3的异喹啉-1,3(2H,4H)-二酮。该反应具有温和的反应条件,操作简便性和广泛的底物范围。
Mn-Mediated Electrochemical Trifluoromethylation/C(sp<sup>2</sup>)–H Functionalization Cascade for the Synthesis of Azaheterocycles
作者:Zhenxing Zhang、Lei Zhang、Yang Cao、Feng Li、Guangcan Bai、Guoquan Liu、Yang Yang、Fanyang Mo
DOI:10.1021/acs.orglett.8b04010
日期:2019.2.1
A general electrohemical strategy for the combined trifluoromethylation/C(sp(2))-H functionalization using Langlois' reagent as the CF3 source under oxidant-free conditions was developed. Using Mn salts as the redox mediator, this method provides an efficient and sustainable I means to access a variety of functionalized heterocycles bearing a CF3 moiety. Detailed mechanistic studies are consistent with the formation of CF3-bound high oxidation state Mn species, suggesting a transition-metal-mediated CF3 transfer mechanism for this trifluoromethylation/C(sp(2))-H functionalization process.
Metal-Free Direct Intramolecular Carbotrifluoromethylation of Alkenes to Functionalized Trifluoromethyl Azaheterocycles
作者:Lei Li、Min Deng、Sheng-Cai Zheng、Ya-Ping Xiong、Bin Tan、Xin-Yuan Liu
DOI:10.1021/ol403391v
日期:2014.1.17
The first example of a metal-free direct carbotrifluoromethylation of alkenes using inexpensive TMSCF3 as the CF3 source is described. The methodology not only exhibits high chemoselectivity for this transformation but also expands the substrate scope that is difficult to access by known transition-metal-catalyzed methods.