Table 1. Comparison of Sulfonyl Hypoiodites with Other Known Electrophilic Iodinating Methods^a.

comparison with electrophilic iodinating methods	yieldb
(MsO)2 (1, 1.8 equiv) + TBAI (2.0 equiv) in 0.2 M MeCN	84%
I2 (1.3 equiv) + AgOMs (1.3 equiv) in 0.2 M MeCN	90%
I2 (1 equiv) + AgOTf (1 equiv) in 0.2 M DCM	18%
NIS (1 equiv) in 0.2 M HFIP	54%
NIS (10 equiv) in 0.2 M TfOH	0%
Ph2S2 (5 mol %) + DIH (0.75 equiv) in 0.3 M MeCN	29%
I2 (1 equiv) + AgPF6 (1 equiv) in 0.2 M DCM	16%

^aReactions were carried out on a 0.1 mmol scale.

^bYields determined by ¹H NMR spectroscopy with dibromomethane as an internal standard.