172217-02-6Relevant articles and documents
Redox-ligand sustains controlled generation of CF3 radicals by well-defined copper complex
Jacquet, Jérémy,Blanchard, Sébastien,Derat, Etienne,Desage-El Murr, Marine,Fensterbank, Louis
, p. 2030 - 2036 (2016/03/05)
A well-defined copper complex bearing iminosemiquinone ligands performs single electron reduction of an electrophilic CF3+ source into CF3 radicals. This redox behavior is enabled by the ligand which shuttles through two different redox states (iminosemiquinone and iminobenzoquinone) while the copper center is preserved as a Cu(ii). This system was used in the trifluoromethylation of silyl enol ethers, heteroaromatics and in the hydrotrifluoromethylation of alkynes. This is the first example of cooperative redox catalysis for the controlled generation of CF3 radicals.
Iron-catalyzed trifluoromethylation of enamide
Rey-Rodriguez, Romain,Retailleau, Pascal,Bonnet, Pascal,Gillaizeau, Isabelle
supporting information, p. 3572 - 3575 (2015/03/04)
Herein the first example of the iron(II)-catalyzed trifluoromethylation of enamide using mild and simple reaction conditions is reported. The method is cost-effective and uses the easy-to-handle Togni's reagent as the electrophilic CF3 source. This transformation is totally regioselective at the C3 position of enamides and exhibits broad substrate scope, good functional group tolerance and thus demonstrates its useful application in a late-stage fluorination strategy.
Synthesis of novel indole derivatives: Variations in the Bartoli reaction
Dobbs, Adrian P.,Voyle, Martyn,Whittall, Neil
, p. 1594 - 1596 (2007/10/03)
The synthesis of a range of novel substituted indoles and tricyclic indole derivatives is described using an extension of the Bartoli methodology.
Fischer indolization of ethyl pyruvate 2-[2- (trifluoromethyl)phenyl]phenylhydrazone and new insight into the mechanism of the Goldberg reaction. (Fischer indolization and its related compounds. XXVI)
Murakami,Watanabe,Hagiwara,Akiyama,Ishii
, p. 1281 - 1286 (2007/10/02)
The Fischer indolization of ethyl pyruvate 2-[2- (trifluoromethyl)phenyl]phenylhydrazone (5) gave two indolic products, ethyl 7-(trifluoromethyl)-1-phenylindole-2-carboxylate (12) as a minor product and ethyl 1-[2-(trifluoromethyl)phenyl]indole-2-carboxylate (13) as a major product. This result shows that the Fischer indolization occurred on the more electron-rich phenyl group. In the Goldberg reaction to prepare 13 from ethyl indole-2-carboxylate (15) and o- (21) or m-bromo-α,α,α-trifluorotoluene (23), it was found that Goldberg reaction proceeds via a benzyne mechanism, at least in part, in a sterically crowded situation.