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Maike V. Peters, Ragnar S. Stoll, Andreas Kühn and Stefan Hecht Photoswitching of Basicity Angewandte Chemie International Edition 47

Version of Record online: 15 JUL 2008 | DOI: 10.1002/anie.200802050

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Smart bases: By using a photochromic azobenzene-derived blocking group, a piperidine base can be switched between a sterically shielded, inactive form and an accessible, reactive form (see picture; C dark gray, H light gray, O red, N blue). Thus, light can be used for the reversible external modulation of ground-state basicity and hence activity in general base catalysis.

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