We developed a novel and efficient method for the synthesis of various 3-alkylated quinoxalin-2(1H)-ones (32 examples, 70%-96% yields) through electron donor-acceptor complex enabled alkylation of quinoxalin-2(1H)-ones with N-hydroxyphthalimide esters as the alkyl source and Na 2 S as the catalytic electron donor under external photocatalyst-, oxidant-and additive-free conditions.
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