Organophotocatalytic Radical–Polar Cross-Coupling of Styrylboronic Acids and Redox-Active Esters
作者:Allan J. B. Watson、Jeremy Brals、Nicholas D’Arcy-Evans、Thomas M. McGuire
DOI:10.1055/a-2179-6570
日期:2024.1
We report the development of a radical–polar cross-coupling reaction using styrylboronic acids and redox-active esters under organophotoredox catalysis. The reaction proceeds through a formal polarity-mismatched radical addition. The use of an organic photocatalyst permitted very low loadings of the electron-shuttle additive and accelerated reaction times compared with established processes. The scope
A Chemoselective Polarity‐Mismatched Photocatalytic C(sp<sup>3</sup>)−C(sp<sup>2</sup>) Cross‐Coupling Enabled by Synergistic Boron Activation**
作者:Jeremy Brals、Thomas M. McGuire、Allan J. B. Watson
DOI:10.1002/anie.202310462
日期:2023.10.16
We report a rare polarity-mismatched radical addition reactionusing styrene boronic acids and redox-active N-hydroxyphthalimide (NHPI) esters under photoredox catalysis. The reactiondisplays broad scope with mechanistic investigations supporting a unique synergistic activation pathway that displays chemoselectivity for styrene boronic acids in the presence of other SOMOphiles. SOMO=singly occupied