Electrophilic trifluoromethylation of arenes and N-heteroarenes using hypervalent iodine reagents
作者:Matthias S. Wiehn、Ekaterina V. Vinogradova、Antonio Togni
DOI:10.1016/j.jfluchem.2010.06.020
日期:2010.9
The reaction of hypervalentiodine trifluoromethylating reagents with a variety of arenes and N-heteroarenes gives access to the corresponding trifluoromethylated compounds. In comparative studies, 1-trifluoromethyl-1,3-dihydro-3,3-dimethyl-1,2-benziodoxole (2) proved to be the superior to 1-trifluoromethyl-1,2-benziodoxol-3-(1H)-one (1) for the direct aromatic trifluoromethylation. Depending on the
Metal-free oxidative trifluoromethylation of indoles with CF<sub>3</sub>SO<sub>2</sub>Na on the C2 position
作者:Jiao-Jiao Xie、Zhi-Qing Wang、Guo-Fang Jiang
DOI:10.1039/c9ra07785e
日期:——
An efficient method of synthesizing 2-trifluoromethylindoles from indoles with easy-to-handle, cheap and low-toxic CF3SO2Na under metal-free conditions is described, which selectively introduces trifluoromethyl to indoles on the C2 position.
Au@ZnO Core–Shell: Scalable Photocatalytic Trifluoromethylation Using CF<sub>3</sub>CO<sub>2</sub>Na as an Inexpensive Reagent under Visible Light Irradiation
作者:Zahra Bazyar、Mona Hosseini-Sarvari
DOI:10.1021/acs.oprd.9b00225
日期:2019.11.15
difficult. Here, we report a new scalable and operationally simple trifluoromethylation reaction using sodium trifluoroacetate as a reagent and Au-modified ZnO as a photocatalyst under visible light irradiation. The reaction proceeds via trifluoromethylation of a broad range of aryl halides, arylboronic acids, and arene and heteroarene substrates. Some pharmaceutical and agrochemical compounds have
Rapid Trifluoromethylation and Perfluoroalkylation of Five-Membered Heterocycles by Photoredox Catalysis in Continuous Flow
作者:Natan J. W. Straathof、Hannes P. L. Gemoets、Xiao Wang、Jaap C. Schouten、Volker Hessel、Timothy Noël
DOI:10.1002/cssc.201301282
日期:2014.6
these batch protocols, the application of microflow technology could greatly enhance and intensify these reactions. A simple and straightforward photocatalytic trifluoromethylation and perfluoroalkylation method has been developed in continuous microflow, using commercially available photocatalysts and microflow components. A selection of five‐membered hetero‐aromatics were successfully trifluoromethylated
There are provided methods for the control of insects and the protection of crops from the damage caused thereby which comprise the use of compositions comprising an indole compound of formula I ##STR1##