Two novel, strained trans-10b,10c-dihydropyrenes, 9a–b, with internal, bulky trimethylsilylmethyl substituent(s) were synthesized. Their 14π-electron annulene systems were found to be distorted, as shown by X-ray crystallographic analyses and 1H-NMR and UV spectroscopy.
T. Sawada, M. Wakabayashi, H. Takeo, A. Miyazawa, M. Tashiro, T. Thiemann and S. Mataka, J. Chem. Soc., Perkin Trans. 1, 1999, 403 DOI: 10.1039/A809561B
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