“…Direct iodination using I 2 is a simple method, but is not straight forward and requires the oxidation of iodine to the more reactive species with a pronounced I + nature. 25 Iodination using ICl is carried out in Lewis acids 26 such as Hg(OTf) 2 and AgOTf. 6 Several reagents reported for iodination of aromatic compounds include iodine and 1,4bis(triphenylphosphonium)-2-butene peroxodisulfate 7 , iodine and pyridine/dioxane 8 , AgNO 3 /I 2 9 , I 2 /NaBO 3 .4H 2 O in ionic liquid 10 , I 2 /HIO 3 , heat 11 , I 2 /CrO 3 13 , NaClO 2 /NaI/HCl 14 , KI/K 2 FeO 4 in water 15 , N-iodosuccinimide and catalytic trifluoroacetic acid 16 , pyCl/CH 3 OH 17 , I 2 /Pb(OAc) 4 12 , KI/H 2 O 2 18 , KI/KIO 3 /H +19 , KClO 3 /KI/HCl 20 , NCS/NaI 21 and iodine with H 2 O 2 and O 2 .…”