Treatment of various aromatic compounds with 1-(p-toluenesulfonyloxy)-
1,2-benziodoxol-3(1H)-one 1A and iodine gave the corresponding iodinat
ed compounds in good yields. Similarly, chlorination and bromination p
roceeded effectively. As compared with other trivalent iodine compound
s, the iodinane 1A showed the best reactivity as a halogenation reagen
t.