Since molecular iodine itself is poorly reactive, substantial efforts have been invested in the development of efficient, selective, and mild methods for direct introduction of iodine into organic molecules. Numerous reagents and procedures have been reported for iodination of aromatic compounds, but direct iodinations of heteroaromatics are limited to some reagents such as NaClO 2 /NaI/HCl [9], KICl 2 [10], halogen exchange [11], I 2 /PhI(OCOCF 3 ) 2 [12], IPy 2 BF 4 ...
