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The reaction of aromatic amines with benzyltrimethylammonium dichloroiodate(1—) in dichloromethane–methanol in the presence of calcium carbonate powder for several hours at room temperature gave selectively iodosubstituted aromatic amines in good yields.

The reaction of phenols with benzyltrimethylammonium tribromide in dichloromethane-methanol for 1 h at room temperature gave polybromophenols in good yields.

The reaction of phenols with benzyltrimethylammonium dichloroiodate(1–) in dichloromethane-methanol in the presence of CaCO3 or NaHCO3 for several hours at room temperature gave iodophenols in good yields.