In part three oxidation of bromide with an ion-supported ( diacetoxyiodo) benzene in ionic liquids afforded a clean path for bromination of alkenes. It was found that this reaction is highly stereoselective. 在离子液体中使用离子支持的二乙酸碘苯氧化溴离子,提供了一条清洁的烯烃加溴途径,发现反应具有高的立体选择性。