4) An undergraduate researcher, James, was given the task of removing a t-butyl ether from the tyrosine derivative A to release the free phenol. James looked up a standard t-butyl ether removal procedure and ran the reaction. Instead of getting the desired product, B, he got a high yield of C. Show a reaction mechanism that explains why James did not get the desired product. Make sure your mechanism explains why James only got the ortho product. A HO. NHAC NHAC OBn OBn HO NHAC F3C OH OBn DCM, r.t. B 0% yield C 99% yield

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