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As the raw materials of organic–inorganic dyes, 2-triethoxysilylazulene derivatives (2a–2d) were synthesized via a cross-coupling reaction between a 2-haloazulene derivative (1a–1d) and triethoxysilane in the presence of a rhodium catalyst. Compounds 2a–2d were obtained as colored liquids and characterized using NMR and mass spectroscopy. The UV–Vis spectra of 2a–2d were red-shifted as compared to...
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