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Unusual demethylenation reactions of cyclopropanes under UV‐light irradiation were found within a cavity of a photoactive coordination cage. The reaction proceeded via a guest‐to‐host electron transfer owing to the highly electron‐deficient nature of the cage. The reactions were highly chemoselective and enabled late‐stage derivatization of a steroid molecule, which led to a totally new un‐natural...
Metal–organic frameworks can be used as porous templates to exert control over polymerization reactions. Shown here are the possibilities offered by these crystalline, porous nanoreactors to capture highly‐reactive intermediates for a better understanding of the mechanism of polymerization reactions. By using a cyclodextrin framework the polymerization of pyrrole is restricted, capturing the formation...
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