Abstract
A palladium-catalyzed regioselective arylation at the C6 position of 7-hydroxyflavone protocol was disclosed for the first time. The reaction occurs in carbamate directing group directed CH activation manner. The key to this high regioselectivity is the appropriate choice of carbamates as protecting/directing groups and H3PO4 additive in the presence of Pd (TFA)2 catalyst. Additionally, the procedure provided an expedient approach for the preparation of 6-arylflavone derivatives.
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