Photoredox Catalysis: A Mild, Operationally Simple Approach to the Synthesis of α-Trifluoromethyl Carbonyl Compounds
作者:Phong V. Pham、David A. Nagib、David W. C. MacMillan
DOI:10.1002/anie.201101861
日期:2011.6.27
A facile and efficient method for the α‐trifluoromethylation of carbonylcompounds and enolsilanes has been accomplished through application of a photoredox catalysis strategy. A one‐flask procedure for the direct α‐trifluoromethylation and α‐perfluoroalkylation of ketone, amide, and ester substrates as well as silylketene acetals is described (see scheme).
Copper-Catalysed Decarboxylative Trifluoromethylation of <i>β</i>
-Ketoacids
作者:Xiaolan Xu、Huanhuan Chen、Jianbo He、Huajian Xu
DOI:10.1002/cjoc.201700271
日期:2017.11
An efficient method for Cu‐catalyzed decarboxylative trifluoromethylation of β‐ketoacids to achieve α‐trifluoromethyl ketones was developed. A wide variety of synthetically useful α‐trifluoromethyl ketones were obtained in modest to good yields under mild reaction conditions. The present method also exhibits good functional‐group compatibility.
Scissoring Enaminone C═C Double Bond by Free Radical Process for the Synthesis of α-Trifluoromethyl Ketones with CF<sub>3</sub>SO<sub>2</sub>Na
作者:Lu Gan、Qing Yu、Yunyun Liu、Jie-Ping Wan
DOI:10.1021/acs.joc.0c02431
日期:2021.1.1
The C═C double bond cleavage on tertiary enaminones, enabling the formation of a new C–CF3 bond, has been realized as a practical method for the synthesis of α-trifluoromethyl ketones with only the promotion of TBHP and ambient heating. Control experiments support that the reactions proceed via a featured freeradical process. The deuterium labeling experiment employing D2O indicates that water participated
Synthesis of α‐Trifluoromethylated Ketones from Vinyl Triflates in the Absence of External Trifluoromethyl Sources
作者:Takuji Kawamoto、Rio Sasaki、Akio Kamimura
DOI:10.1002/anie.201608591
日期:2017.1.24
A novel method for the conversion of vinyl triflates into α‐trifluoromethylated ketones in the absence of external trifluoromethyl sources is described. This process accomplishes an efficient migration of the trifluoromethyl group of the triflate to the α‐position in the ketone through a radical process. The reaction proceeds by the addition of a trifluoromethyl radical to the vinyl triflate and subsequent