10.1002/anie.201608297
The research focuses on developing a practical photocatalytic method for the trifluoromethylation and hydrotrifluoromethylation of styrenes, which are challenging substrates due to potential side reactions. The experiments utilize fac-Ir(ppy)3 as a photocatalyst, visible light, and the inexpensive CF3I as the trifluoromethylating agent. The study explores batch and continuous-flow reaction conditions to improve reaction time and selectivity. Reactants include various styrene derivatives, CF3I, and 4-hydroxythiophenol (4-HTP) as a hydrogen atom donor for hydrotrifluoromethylation. Analyses involve determining yields and E/Z ratios using 19F-NMR spectroscopy with a,a,a-trifluorotoluene as an internal standard, and evaluating the impact of different bases, solvents, and light conditions on the reaction outcomes.
10.1016/0022-328X(86)82021-6
The research details the synthesis and investigation of trifluoromethyl and mixed hydrido trifluoromethyl complexes of iridium(II) as potential precursors for an iridium(I) trifluoromethyl complex. The purpose of the study was to extend reactivity studies on the CF3 ligand in d6 complexes and to prepare a d8 trifluoromethyl complex of iridium by reducing a suitable d6 compound. The target species was Ir(CF3)(CO)(PPh3), which is analogous to Vaska's compound. The researchers synthesized two thermally stable hydrido trifluoromethyl complexes of iridium(II), but the reduction to the desired iridium(I) trifluoromethyl compound was not achieved. Key chemicals used in the process included iridium trichloride, IrCl(CO)(PPh3)2, CF3I, AgSbF6, acetonitrile, para-tolyl isocyanide, NaOMe, LiEt3BH, and NaBH4. The study concluded that while the synthesis of the iridium(II) complexes was successful, further research is needed to achieve the reduction to the iridium(I) complex.