Angewandte Chemie International Edition
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Inside Cover: Transition-Metal-Promoted Chemoselective Photoreactions at the Cucurbituril Rim (Angew. Chem. Int. Ed. 2/2011)
Cucurbiturils are water-soluble macrocycles with still limited applications. In their Communication on page 545 ff., W. Nau et al. employ them as inverse phase-transfer catalysts to bind a photoreactive substrate (an azoalkane) and as a template to dock metal ions. Upon laser photolysis of this ternary complex, nitrogen is eliminated, new photoproducts form, and the ratios of the product hydrocarbons reveal new chemoselectivities.