Abstract
A green and highly efficient cooperative photocatalytic system which consists of riboflavin tetraacetate (RFT), N-hydroxysuccinimide (NHS) and FeCl3·6H2O has been developed for CH bond oxygenation with visible light under mild reaction conditions. Compared to the previous procedures about CH bond activation by using flavins as photocatalyst, we use cheap ferric chloride and NHS instead of expensive scandium triflate or biomimetic non-heme iron complex, further expand the substrate scopes. In addition, a possible radical mechanism for the CH bond oxygenation in this photocatalytic system is proposed.
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