Hexaarylcyclotrisiloxanes were selectively prepared by solvent-free synthesis from diarylsilanediol. These well-known stable compounds were found to undergo palladium-catalyzed cross-coupling reaction with aryl halides in good yields. All of attached aryl groups on silicon atom could be utilized. Furthermore, base-sensitive functionality such as acetyl and nitro groups survived the reaction.

Hexaarylcyclotrisiloxane, which is one of the most stable derivatives of diarylsilanediol, was found to undergo palladium-catalyzed cross-coupling reaction with aryl halides in good yields. The reaction is performed in an aqueous medium taking potassium hydroxide as an activator. Both of the two aryl groups attached to each silicon atom could be utilized. Some base-sensitive functionality such as acetyl and nitro groups survived the reaction.

Hexaarylcyclotrisiloxane. -Easily prepared and stable hexaarylcyclotrisiloxane is efficiently used as reagent for the Pd-catalyzed cross-coupling with aryl halides. Some base-sensitive functionalities such as acetyl and nitro groups survive the reaction. -(ENDO, M.; SAKURAI, T.; OJIMA, S.; KATAYAMA, T.; UNNO, M.; MATSUMOTO, H.; KOWASE, S.; SANO, H.; KOSUGI*, M.; FUGAMI, K.; Synlett 2007, 5, 749-752; Dep. Chem., Gunma Univ., Kiryu, Gunma 376, Japan; Eng.) -Mais 30-066

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