The electrophilic iodine species attacks the electron-rich aromatic ring of 2,6-di-tert-butylphenol. The phenolic oxygen donates its electron pair to the iodine atom, leading to the formation of an arenium ion or Wheland intermediate. This step results in the substitution of one of the hydrogen atoms on the aromatic ring with iodine.
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[S,(+)]-α-Amino-α-phenylacetophenone
