Arenes sodium periodate

A modification of this method consists of the oxidative diacetoxylation of iodoarenes in acetic or trifluoroacetic acid using appropriate oxidants, such as periodates [149-151], chromium(VI) oxide [152], sodium percarbonate [153], m-chloroperoxybenzoic acid (mCPBA) [130, 154-158], potassium peroxodisulfate [159,160], HaOa-urea [161], Selectfluor [33] and sodium perborate [132]. The oxidation of iodoarenes with sodium perborate in acetic acid at 40 °C is probably the most general procedure that has been used for the small-scale preparation of numerous (diacetoxyiodo)-substituted arenes and hetarenes (Scheme 2.14) [132,133,162-166]. For example, the chiral diacetate 31 and several analogous... 

Calixcrown compounds appear to be a new promising family of carriers for the selective removal of caesium from high salinity and acidity media such as MLW through an SLM. By choosing a highly hydrophobic organic diluent, o-NPOE, and a lipophilic crown-6-calix[4]arene derivative in the 1,3-altemate conformation suitable for caesium complexation over that of sodium, very selective and stable SLMs can be obtained (over a period of 50 days). 

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