acetylenes bearing a variety of substituents with perfluoroalkyl iodides in the presence of a catalytic amount of triethylborane provides the corresponding perfluoroalkenes in good to excellent yields. The addition of perfluoroalkyl iodides to olefins is also described.
Strongly Reducing, Visible‐Light Organic Photoredox Catalysts as Sustainable Alternatives to Precious Metals
作者:Ya Du、Ryan M. Pearson、Chern‐Hooi Lim、Steven M. Sartor、Matthew D. Ryan、Haishen Yang、Niels H. Damrauer、Garret M. Miyake
DOI:10.1002/chem.201702926
日期:2017.8.16
Photoredox catalysis is a versatile approach for the construction of challenging covalent bonds under mild reaction conditions, commonly using photoredox catalysts (PCs) derived from precious metals. As such, there is need to develop organic analogues as sustainable replacements. Although several organic PCs have been introduced, there remains a lack of strongly reducing, visible-light organic PCs
Iron-Catalyzed 1,2-Addition of Perfluoroalkyl Iodides to Alkynes and Alkenes
作者:Tao Xu、Chi Wai Cheung、Xile Hu
DOI:10.1002/anie.201402511
日期:2014.5.5
Iron catalysis has been developed for the intermolecular 1,2‐addition of perfluoroalkyliodides to alkynes and alkenes. The catalysis has a wide substrate scope and high functional‐group tolerance. A variety of perfluoroalkyliodides including CF3I can be employed. The resulting perfluoroalkylated alkyl and alkenyl iodides can be further functionalized by cross‐coupling reactions. This methodology
Metal-free and light-promoted radical iodotrifluoromethylation of alkenes with Togni reagent as the source of CF<sub>3</sub> and iodine
作者:Redouane Beniazza、Maxime Douarre、Dominique Lastécouères、Jean-Marc Vincent
DOI:10.1039/c7cc00214a
日期:——
Iodotrifluoromethylation of alkenes is effectively conducted by combining benzophenone, “black light”, isopropanol and Togni reagent 1 as the source of both the CF3 group and iodine atom.
The bromodifluoromethylation of lithium enolates of chiral N-acyloxazolidinones via the insertion of difluorocarbene proceeds with good diastereomeric excess (68–92% de).