Catalyst-Free Oxytrifluoromethylation of Alkenes through Paired Electrolysis in Organic-Aqueous Media
作者:Wolfgang Jud、C. Oliver Kappe、David Cantillo
DOI:10.1002/chem.201804708
日期:2018.11.22
A mild, catalyst‐free electrochemical oxytrifluoromethylation of alkenes has been developed. The procedure is based on the paired electrolysis of sodium triflinate and water in an undivided cell. Anodic oxidation of the triflinate anion generates trifluoromethyl radicals that react with the alkene. Water plays a dual role as oxidant for the cathode and nucleophile. The method has been utilized to prepare
Manganese-Catalyzed Aerobic Oxytrifluoromethylation of Styrene Derivatives Using CF<sub>3</sub>SO<sub>2</sub>Na as the Trifluoromethyl Source
作者:Yi Yang、Yingle Liu、Yan Jiang、Yu Zhang、David A. Vicic
DOI:10.1021/acs.joc.5b00781
日期:2015.7.2
A mild and practical protocol for manganese-catalyzed aerobic oxytrifluoromethylation of olefinic bonds of styrene derivatives using CF3SO2Na (Langlois' reagent) as the CF3 source is described. A distinguishing feature of this method is the generation of trifluoromethyl radicals from CF3SO2Na using the simple manganese salt/O-2 system. The reaction proceeds under ambient conditions, free of added peroxide initiators, and provides moderate to good selectivities for alcohol versus ketone product.
A Practical Method for Metal-Free Radical Trifluoromethylation of Styrenes with NaSO2CF3
A mild and practical protocol for the metal-free trifluoromethylation of styrenes using NaSO2CF3 (Langlois reagent) and TBHP was developed. The approach provides efficient access to -trifluoromethylated ketones and alcohols in moderate to good yields.