title: Disiloxane Synthesis Based on Silicon-Hydrogen Bond Activation using Gold and Platinum on Carbon in Water or Heavy Water.
abstract: Disiloxanes possessing a silicon-oxygen linkage are important as frameworks for functional materials and coupling partners for Hiyama-type cross coupling. We found that disiloxanes were effectively constructed of hydrosilanes catalyzed by gold on carbon in water as the solvent and oxidant in association with the emission of hydrogen gas at room temperature. The present oxidation could proceed via various reaction pathways, such as the hydration of hydrosilane into silanol, dehydrogenative coupling of hydrosilane into disilane, and the subsequent corresponding reactions to disiloxane. Additionally, the platinum on carbon catalyzed hydrogen-deuterium exchange reaction of arylhydrosilanes as substrates in heavy water proceeded on the aromatic nuclei at 80 °C with high deuterium efficiency and high regioselectivity at the only meta and para positions of the aromatic-silicon bond to give the deuterium-labeled disiloxanes.
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Sawama
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Masuda
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Yasukawa
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Nakatani
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Shumma
authors.initials: S
authors.lastname: Nishimura
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Kyoshiro
authors.initials: K
authors.lastname: Shibata
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Yamada
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Yasunari
authors.initials: Y
authors.lastname: Monguchi
authors.affiliation: Catalyst Development Center, N. E. Chemcat Corporation , 25-3 Koshindaira, Bando, Ibaraki 306-0608, Japan.
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Suzuka
authors.affiliation: Catalyst Development Center, N. E. Chemcat Corporation , 678 Ipponmatsu, Numazu, Shizuoka 410-0314, Japan.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Takagi
authors.affiliation: Laboratory of Organic Chemistry, Gifu Pharmaceutical University , 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
authors.forename: Hironao
authors.initials: H
authors.lastname: Sajiki