Electron donor–acceptor complex-catalyzed photoredox reactions mediated by DIPEA and inorganic carbonates

Abstract

A catalytic EDA complex, composed of DIPEA as a donor catalyst, NHPI ester as the acceptor, and inorganic carbonate as a stabilizer and electron transfer mediator, is reported. This photoactivation system is a simple, efficient and sustainable radical generation platform for developing decarboxylative reactions of NHPI esters. Alkylated coumarins, phenanthridine derivatives and tertiary oxindoles were synthesized using this approach without need of metal complex or organic dye photocatalysts.