Stepwise synthesis and characterization of germa[4], [5], [8], and [10]pericyclynes
Hiroki Tanimoto1, Tomohiko Nagao, Taro Fujiwara
1Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayamacho, Ikoma, Nara 630-0192, Japan. tanimoto@ms.naist.jp kakiuchi@ms.naist.jp.
Abstract:
The stepwise syntheses of germa[N]pericyclynes, including [5]pericyclynes, and their characterization are described. The yields of germa[4] and [8]pericyclynes were improved significantly compared to those obtained in previous studies. The routes reported herein afforded the novel germa[5] and [10]pericyclynes, which were characterized by X-ray crystallography, UV-Vis spectroscopy, and fluorescence emission spectroscopy. A unique fluorescence emission was observed for the large germa[10]pericyclyne ring.
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