developed for the asymmetricsynthesis of bisphosphonate derivatives, a class of pharmaceutically important molecules. Cheap and commercially available dihydroquinine effectively catalyzed conjugate additions of cyclic beta-ketoesters to ethylidenebisphosphonate esters, leading to optically active geminal bisphosphonates, bearing an all-carbonsubstitutedquaternarystereocenter, in high yields and
Radical Perfluoroalkylation of Arenes via Carbanion Intermediates
作者:Lucas W. Hernandez、William P. Gallagher、Carlos A. Guerrero、Francisco Gonzalez-Bobes、John R. Coombs
DOI:10.1021/acs.joc.1c01296
日期:2021.8.6
facilitates the direct perfluoroalkylation of arenes with pendant benzylic electron-withdrawinggroups. This occurs via attack of the arene on the electrophilic perfluoroalkyl radical, through the donation of electron density from a benzylic anion. The substrate scope was expanded beyond benzylic nitriles with cyclic substrates bearingelectron-withdrawinggroups at the benzylic position—enforcing donation