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Single‐Electron Transmetalation: Synthesis of 1,1‐Diaryl‐2,2,2‐trifluoroethanes by Photoredox/Nickel Dual Catalytic Cross‐Coupling
Author(s) -
Ryu DaWeon,
Primer David N.,
Tellis John C.,
Molander Gary A.
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201504079
Subject(s) - transmetalation , nickel , dual (grammatical number) , catalysis , coupling (piping) , chemistry , photochemistry , materials science , metallurgy , organic chemistry , art , literature
Novel methods for the incorporation of fluorinated subunits into organic frameworks are important in pharmaceutical, agrochemical, and materials science applications. Herein, the first method for the cross‐coupling of benzylic α‐trifluoromethylated alkylboron reagents with (hetero)aryl bromides is achieved through application of a photoredox/nickel dual catalytic system. The harsh conditions and high temperatures required by conventional Suzuki‐coupling protocols are avoided by exploitation of an odd‐electron pathway that permits room temperature transmetalation of these recalcitrant reagents. This method represents the first direct and general route for the synthesis of unsymmetrical 1,1‐diaryl‐2,2,2‐trifluoroethanes, thereby providing efficient access to a previously unexplored chemical space.