Nickel‐Catalyzed Direct Trifluoroethylation of Aryl Iodides with 1,1,1‐Trifluoro‐2‐Iodoethane via Reductive Coupling
作者:Han Li、Jie Sheng、Guang‐Xu Liao、Bing‐Bing Wu、Hui‐Qi Ni、Yan Li、Xi‐Sheng Wang
DOI:10.1002/adsc.202000985
日期:2020.12.8
CF3CH2I has been developed, demonstrating high efficiency, excellent functional‐group compatibility, especially with large sterically hindered groups. The key to success is the combination of nickel with readily available nitrogen and phosphine ligands. The powerful potential of this strategy is further demonstrated by the late‐stage modification of several derived bioactive molecules.
Copper-Mediated Deoxygenative Trifluoromethylation of Benzylic Xanthates: Generation of a CCF<sub>3</sub>Bond from an O-Based Electrophile
作者:Lingui Zhu、Shasha Liu、Justin T. Douglas、Ryan A. Altman
DOI:10.1002/chem.201302328
日期:2013.9.16
are capable of converting O‐based electrophiles into trifluoromethanes. The copper‐mediated trifluoromethylation of benzylicxanthates using Umemoto’s reagent as the source of CF3 to form CCF3 bonds is described. The method is compatible with an array of benzylicxanthates bearing useful functional groups. A preliminary mechanistic investigation suggests that the CCF3 bond forms by reaction of the
Copper-Catalyzed Synthesis of Trifluoroethylarenes from Benzylic Bromodifluoroacetates
作者:Brett R. Ambler、Lingui Zhu、Ryan A. Altman
DOI:10.1021/acs.joc.5b01343
日期:2015.8.21
Trifluoroethylarenes are found in a variety of biologically active molecules, and strategies for accessing this substructure are important for developing therapeutic candidates and biological probes. Trifluoroethylarenes can be directly accessed via nucleophilic trifluoromethylation of benzylic electrophiles; however, current catalytic methods do not effectively transform electron-deficient substrates and heterocycles. To address this gap, we report a Cu-catalyzed decarboxylative trifluoromethylation of benzylic bromodifluoroacetates. To account for the tolerance of sensitive functional groups, we propose an inner-sphere mechanism of decarboxylation.
Palladium-Catalyzed 2,2,2-Trifluoroethylation of Organoboronic Acids and Esters