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- Title
Dynamic Interconversion between Boroxine Cages Based on Pyridine Ligation.
- Authors
Ono, Kosuke; Shimo, Shunsuke; Takahashi, Kohei; Yasuda, Nobuhiro; Uekusa, Hidehiro; Iwasawa, Nobuharu
- Abstract
Abstract: Dynamic interconversion between large covalent organic cages was achieved simply by heating or acid/base treatment. A mixture of the boroxine cages <bold>12‐mer</bold> and <bold>15‐mer</bold> was cleanly converted into a pyridine adduct of the <bold>9‐mer</bold> boroxine cage upon treatment with pyridine, and the geometry of N‐coordinated boron atoms changed from trigonal to tetrahedral. The reverse reaction was achieved by heating or acid treatment. In this process, the larger boroxine cages <bold>12‐mer</bold> and <bold>15‐mer</bold> were found to be entropically favored owing to the release of free pyridine molecules from <bold>9‐mer</bold>⋅6 Py.
- Subjects
PYRIDINE; TETRAHEDRAL molecules; HEAT treatment; THERAPEUTICS
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 12, p3167
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201713221