Synthesis of hypervalent iodine(III) compounds

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Sodium perborate in acetic acid is an effective reagent for the oxidation of aromatic aldehydes to carboxylic acids, iodoarenes to (diacetoxyiodo)arenes, azines to N-oxides, and various sulphur heterocycles to S,S-dioxides. Nitriles undergo smooth oxidative hydration to amides when aqueous methanol is employed as solvent.
A. McKillop, D. Kemp, Tetrahedron, 1989, 45, 3299-3306.

A modified procedure for the direct synthesis of hypervalent [bis(trifluoroacetoxy)iodo]arenes avoids the use of hazardous reagents with the workup being only an aqueous extraction.
T. Keri Page, T. Wirth, Synthesis, 2006, 3080-3084.

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A highly efficient and mild procedure for the oxidation of different types of alcohols uses TEMPO as catalyst, iodobenzene dichloride as stoichiometric oxidant, and pyridine as base. Oxidation of 1,2-diols gives α-hydroxy ketones or α-diketones depending on the amount of oxidant used. High yielding procedures for the preparation of iodoarene dichlorides have been developed.
X.-F. Zhao, C. Zhang, Synthesis, 2007, 551-557.