A novel electron‐donor–acceptor (EDA) complex‐mediated direct CH trifluoromethylation of arenes with Umemoto’s reagent has been developed. This transformation has been enabled by an unprecedented EDA complex formed by Umemoto’s reagent and an amine, which was supported by experiments and theoretical calculations. The radical‐based methodology presented here allows to access highly‐functionalized trifluoromethyl
Nickel-Catalyzed C-H Trifluoromethylation of Electron-Rich Heteroarenes
作者:Yun Wu、Hao-Ran Zhang、Ruo-Xing Jin、Quan Lan、Xi-Sheng Wang
DOI:10.1002/adsc.201600702
日期:2016.11.17
The first example of a nickel‐catalyzed C–H trifluoromethylation of electron‐richheteroarenes, including imidazopyridines, indoles and thiophenes, has been developed with the commercially available and relatively inexpensive industrial raw material iodotrifluoromethane (CF3I) as the trifluoromethylating reagent. The synthetic potential of this method is demonstrated by its successful application to
α-Trifluoromethyl-β-aryl enamines in the synthesis of trifluoromethylated heterocycles by the Fischer and the Pictet–Spengler reactions
作者:Vasiliy M. Muzalevskiy、Valentine G. Nenajdenko、Aleksey V. Shastin、Elizabeth S. Balenkova、Günter Haufe
DOI:10.1016/j.tet.2009.06.120
日期:2009.9
α-Trifluoromethyl-β-aryl enamines were successfully used as synthetic equivalents of benzyltrifluoromethyl ketones in both the Fischer indole synthesis and the Pictet–Spengler reaction. Accordingly, 2-trifluoromethyl indoles and a variety of trifluoromethylated 4,5,6,7-terahydro-1H-pyridines including carbolines were synthesized in moderate to good yields.
p-TsOH promoted Fischer indole synthesis of multi-substituted 2-trifluoromethyl indole derivatives
作者:Haizhen Jiang、Yangli Wang、Wen Wan、Jian Hao
DOI:10.1016/j.tet.2010.01.080
日期:2010.4
promoted one-pot synthesis of multi-substituted 2-trifluoromethyl indolederivatives, for instance, 2-trifluoromethyl-3-phenylindoles, 2-trifluoromethyl-indole-3-propanoates, and 2-trifluoromethyl-indole-3-butanoates from reactions of 1,1,1-trifluoro-3-phenylacetone and simply prepared ω-trifluoromethyl substituted δ and ɛ-ketoesters with arylhydrazines viaFischerindolesynthesis has been developed