Sunlight-driven trifluoromethylation of olefinic substrates by photoredox catalysis: A green organic process
作者:Munetaka Akita、Takashi Koike
DOI:10.1016/j.crci.2015.01.013
日期:2015.7
types of catalytic photoredox processes following the reductive quenching cycle (RQC) and the oxidative quenching cycle (OQC), the discussion is focused on organic transformations based on OQC, in particular the trifluoromethylation of olefinic substrates with electrophilic trifluoromethylating reagents furnishing solvolytic addition products and substitution products. It is concluded that catalytic
A new method for the synthesis of vinyl trifluoromethyl compounds from α, β‐unsaturated carboxylic acids and CF3SO2Na has been developed. This electrochemical decarboxylative trifluoro‐methylation was found to be highly stereoselective and afforded products in good yields with wide substrate scope under metal‐free and external chemical oxidant‐free conditions.
已开发出一种由α,β-不饱和羧酸和CF 3 SO 2 Na合成乙烯基三氟甲基化合物的新方法。发现这种电化学脱羧三氟甲基化反应具有高度的立体选择性,并且在无金属和无外部化学氧化剂的条件下,可以提供高收率的产品,具有广泛的底物范围。
Stereoselective introduction of a trifluoromethyl allylic group
作者:Frédérique Tellier、Raymond Sauvêtre
DOI:10.1016/s0022-1139(00)80092-5
日期:1993.6
High regio- and stereo-selective introduction of a trifluoromethyl group in various unsaturatedsystems is described. The key step is the treatment of 1,1-difluoro-1-alken-3-olswith (diethylamino)sulphur trifluoride (DAST) to give 1,1,1-trifluoro-2-alkenes.
Copper- and Iron-Catalyzed Decarboxylative Tri- and Difluoromethylation of α,β-Unsaturated Carboxylic Acids with CF<sub>3</sub>SO<sub>2</sub>Na and (CF<sub>2</sub>HSO<sub>2</sub>)<sub>2</sub>Zn via a Radical Process
作者:Zejiang Li、Zili Cui、Zhong-Quan Liu
DOI:10.1021/ol3034059
日期:2013.1.18
A copper-catalyzed decarboxylative trifluoromethylation of various α,β-unsaturated carboxylic acids by using a stable and inexpensive solid, sodiumtrifluoromethanesulfinate (CF3SO2Na, Langlois reagent), was developed. In addition, an iron-catalyzed difluoromethylation of aryl-substituted acrylic acids by using zinc difluoromethanesulfinate (DFMS, (CF2HSO2)2Zn, Baran reagent) via a similar radical
通过使用稳定且廉价的固体三氟甲烷亚磺酸钠(CF 3 SO 2 Na,Langlois试剂),开发了铜催化的各种α,β-不饱和羧酸的脱羧三氟甲基化反应。另外,还通过类似的自由基方法,通过使用二氟甲亚磺酸锌(DFMS,(CF 2 HSO 2)2 Zn,Baran试剂),实现了铁催化的芳基取代的丙烯酸的二氟甲基化。
Palladium Catalyzed Vinyltrifluoromethylation of Aryl Halides through Decarboxylative Cross-Coupling with 2-(Trifluoromethyl)acrylic Acid
作者:Subban Kathiravan、Ian A. Nicholls
DOI:10.1021/acs.orglett.5b00551
日期:2015.4.17
An efficient Pd-catalyzed stereoselective vinyltrifluoromethylation of aryl halides, through decarboxylative cross-coupling with 2-(trifluoromethyl)acrylic acid is described. The ready availability of the starting materials, the high level of functional group tolerance, and excellent E/Z selectivity make this protocol a safe and operationally convenient strategy for efficient synthesis of vinyltrifluoromethyl