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。
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
An efficient decarboxylative trifluoromethylation of α,β-unsaturated carboxylic acids using the Langlois reagent as a trifluoromethyl precursor has been achieved by an electro-oxidative strategy. Under catalyst-free and external oxidant-free electrolysis conditions, a series of Cvinyl-CF3 compounds are obtained with a high regioselectivity in good yields. The successful trapping of the CF3 radical
Domino Hydroboration/Trifluoromethylation of Alkynes Using Fluoroform-Derived [CuCF<sub>3</sub>]
作者:Lisi He、Xinkan Yang、Gavin Chit Tsui
DOI:10.1021/acs.joc.7b00755
日期:2017.6.16
A domino hydroboration/trifluoromethylation (formal hydrotrifluoromethylation) of alkynes using the fluoroform-derived [CuCF3] reagent is achieved. Synthetically useful (E)-alkenyl-CF3 building blocks and 1,1-bis(trifluoromethyl)-substituted alkenes can be prepared under ambient conditions in one pot/one step from alkynes. The ultimate source of CF3 is the inexpensive industrial waste fluoroform.
A Domino Approach of Heck Coupling for the Synthesis of β-Trifluoromethylstyrenes
作者:G. K. Surya Prakash、Hema S. Krishnan、Parag V. Jog、Anjali P. Iyer、George A. Olah
DOI:10.1021/ol300076y
日期:2012.2.17
A domino approach of Heck coupling was used to synthesize beta-trifluoromethylstyrene derivatives from iodoarenes and 1-iodo-3,3,3-trifluoropropane in moderate to good yields. This method avoids the use of low-boiling, gaseous reagents such as 3,3,3-trifluoropropene, and additives and phosphines in the catalytic system.