Enantioselective synthesis of axially chiral sulfur-containing biaryl derivatives through the electrophilic sulfenylation of biaryl phenols has been achieved for the first time. This catalyticasymmetric system, which involves sequential desymmetrization and kinetic resolution, is enabled by a combination of a novel 3,3′-disubstituted BINOL-derived selenide catalyst and an achiral sulfonic acid. Control experiments
We describe herein the “1H NMR-assisted catalyst screening method,” which enables us to find the suitable catalyst easily and predict enantioselectivity with the same accuracy as the computational method. Based on this method, we constructed multisubstituted biaryls that occur frequently in many biologically active compounds, chiral ligands, and organocatalysts, with excellent enantioselectivities via chiral phosphoric acid-catalyzed asymmetric bromination.
highly enantioselectivesynthesis of multisubstituted biarylchlorides/iodides by sequentialhalogenation reactions (desymmetrization/kinetic resolution sequence). The selectivity of biarylchlorides/iodides obtained in the first asymmetric reaction (desymmetrization) could be enhanced by the kinetic resolution‐type asymmetric bromination to afford the corresponding chiralbiarylchlorides/iodides in excellent