Silylium ion-promoted dehydrogenative cyclization: synthesis of silicon-containing compounds derived from alkynes.
Treatment of dialkylbenzylsilane (1) with trityl tetrakis(pentafluorophenyl)borate (TPFPB) in the presence of terminal or internal alkynes (3) and 2,6-di-tert-butyl-4-methylpyridine gave the corresponding 1,2-dihydro-2-silanaphthalene derivatives (4) in 34-82% yields.
Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, 171-8588 Tokyo, Japan. kunio.mochida@gakushuin.ac.jp.
Hidekazu
H
Arii
Takashi
T
Kurihara
Kunio
K
Mochida
Takayuki
T
Kawashima