Light-Driven Four-Component Reaction with Boronic Acid Derivatives as Alkylating Agents: An Amine/Imine-Mediated Activation Approach
Laura Y. Vázquez-Amaya, Brecht Dootselaere, Gerardo M. Ojeda‐Carralero, Serena Pillitteri, Johan Van der Eycken, Erik V. Van der Eycken, Upendra K. Sharma
Abstract
Herein, we describe a one-pot aminoalkylation of styrene derivatives with boronic acids (BAs) and boronic acid pinacol esters as radical precursors for the synthesis of complex secondary amines in moderate to high yields through a mild and easily accessible organophotoredox-catalytic four-component reaction. Additionally, we report for the first time in a photoredox process the activation of alkyl boronic acid derivatives by imines, which play a dual role in the reaction as both substrate and Lewis base activator. The protocol applicability was greatly enhanced by its successful adaptation to photoflow reactors.