Electronically Ambivalent Hydrodefluorination of Aryl‐CF
<sub>3</sub>
groups enabled by Electrochemical Deep‐Reduction on a Ni Cathode
作者:John R. Box、Mickaël E. Avanthay、Darren L. Poole、Alastair J. J. Lennox
DOI:10.1002/anie.202218195
日期:2023.3.13
We report a general procedure for the direct mono- and di-hydrodefluorination of ArCF3 compounds. Exploiting the tunability of electrochemistry and the selectivity enabled by a Nicathode, the deepreduction garners high selectivity with good to excellent yields up to gram scale. The late-stage peripheral editing of CF3 feedstocks to construct fluoromethyl moieties will aid the rapid diversification
Chemoselective Three‐Component Geminal Cross Couplings of Dihaloalkanes with Cr Catalysis: Rapid Access to Tertiary and Quaternary Alkanes via a Metal–Carbene Intermediate
The three-component geminal couplings have been achieved by design of a chromium catalytic system using dihaloalkanes to selective react with organomagnesium and chlorosilanes/alkyl tosylates. These newly developed reactions are effective for rapidly forming tertiary and quaternary alkanes via a Cr carbene intermediate with a novel inner-sphere radical coupling mechanism, showing great potential in