“…Among the most significant iodination strategies are those involving transition metals such as Ru, In, Pd, Mo, Hg, Fe, Ce, Yb, or Ag . A number of transition-metal-free iodination procedures have also been described using I 2 in combination with 1,4-bis(triphenylphosphonium)-2-butene peroxodisulfate, DMSO, HIO 3 , urea-H 2 O 2 , or NO 2 . An additional strategy consists of the oxidation of iodide salts using the systems NH 4 I/H 2 O 2 , NaI/NaClO 2 , or NaClO 2 /NaI/HCl .…”