Abstract
AbstractAn efficient O to C rearrangement of phenolic ethers is developed. The Lewis acid BF3⋅OEt2 (0.5 equiv) could catalyze the O to C migration of β‐aryloxy‐β‐arylesters to β,β‐bis‐arylesters, thereby the free phenolic OH cyclizes with the ester group, resulting in the formation of 4‐aryldihydrocoumarins.
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