Abstract
A new room-temperature ionic liquid (RTIL) supported [hydroxy(tosyloxy)iodo]benzene (ion-supported HTIB) reagent was synthesised by three kinds of effective methods in high yields, which combined the advantages of ionic liquids and the hypervalent iodine. Ion-supported HTIB was an effective reagent for one-step conversion of ketones to the corresponding α-tosyloxylated ketones in the ionic liquid [emim]BF4or acetonitrile under microwave. After the conversion reaction, the reagent was transformed into ion-supported iodobenzene, which could be recovered and regenerated easily without lost of activity.
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