title: Iridium-catalyzed intermolecular dehydrogenative silylation of polycyclic aromatic compounds without directing groups.
abstract: This study describes the iridium-catalyzed intermolecular dehydrogenative silylation of C(sp(2))-H bonds of polycyclic aromatic compounds without directing groups. The reaction produced various arylsilanes through both Si-H and C-H bond activation, with hydrogen as the sole byproduct. Reactivity was affected by the electronic nature of the aromatic compounds, and silylation of electron-deficient and polycyclic aromatic compounds proceeded efficiently. Site-selectivity was controlled predominantly by steric factors. Therefore, the current functionalization proceeded with opposite chemo- and site-selectivity compared to that observed for general electrophilic functionalization of aromatic compounds.
authors: Division of Chemistry and Biotechnology, Graduate School of Natural Science and Technology, 3-1-1, Tsushimanaka, Kita-ku, Okayama 700-8530 (Japan), Fax: (+81) 86-251-8094. masahito.murai@cc.okayama-u.ac.jp.
authors: Masahito
authors: M
authors: Murai
authors: Keishi
authors: K
authors: Takami
authors: Kazuhiko
authors: K
authors: Takai
keywords: CH bond activation; dehydrogenation; iridium; polycyclic aromatic compounds; silylation