To perform iodination of hydroxyl groups, several methods have been described using a variety of reagent systems, such as BF 3 –Et 2 O/NaI, 5 P 2 I 4 , 6 P 4 /I 2 , 7 Cl 2 SO–DMF/KI, 8 MgI 2 , 9 HI, 10 ClSiMe 3 /NaI, 11 R 3 PI 2 –Et 2 O, or C 6 H 6 /HMPA, 12 CeCl 3 ·7H 2 O/NaI, 13 PPh 3 /DDQ/R 4 N + X − , 14 KI/BF 3 ·Et 2 O, 15 ZrCl 4 /NaI, 16 I 2 /petroleum ether, 17 and NaI/Amberlyst 15. 18 Polymer-supported triphenylphosphine/I 2 /ImH has also been used for the ...