Gallium Trichloride-Catalyzed Exhaustive α-Ethynylation Reaction of 1-Silylacetylenes
作者:Ryo Amemiya、Masahiko Yamaguchi
DOI:10.1002/adsc.200600399
日期:2007.5.7
Gallium trichloride (GaCl3) catalyzes the ethynylation reaction of a 1,4-enyne with chlorosilylacetylene at the propargyl position giving a triethynylvinylmethane. This catalytic method can be applied to the exhaustiveα-ethynylation of 1-silylacetylenes possessing less acidic propargyl protons, and mono-, di-, and triethynylated products are obtained depending on the structure of the starting materials
Pyrrolo[2,3-c]pyridine or pyrrolo[3,2-c]pyridine compounds having the general formula (A),
wherein the dashed lines, X, Y and R
1
through R
5
are as defined in the specification. The compounds are useful in the prophylaxis or treatment of viral infections.
Dehydrogenative silylation of terminal alkynes by iridium catalyst
作者:Rie Shimizu、Takamasa Fuchikami
DOI:10.1016/s0040-4039(99)02174-7
日期:2000.2
Dehydrogenativesilylation of terminalalkynes with hydrosilanes proceeds in the presence of iridium catalyst to afford the corresponding silylacetylenes. When phenylacetylene and triethylsilane were heated in dry DME in the presence of Ir4(CO)12–PPh3, (2-phenylethynyl)triethylsilane was obtained in 96% yield with little of hydrosilylated products. The present method is applicable for a variety of
Controlling the Regioselectivity of the Hydrosilylation Reaction in Carbon Nanoreactors
作者:William A. Solomonsz、Graham A. Rance、Mikhail Suyetin、Alessandro La Torre、Elena Bichoutskaia、Andrei N. Khlobystov
DOI:10.1002/chem.201201542
日期:2012.10.8
Hollow graphitized carbon nanofibres (GNF) are employed as nanoscale reaction vessels for the hydrosilylation of alkynes. The effects of confinement in GNF on the regioselectivity of addition to triple carbon–carbon bonds are explored. A systematic comparison of the catalytic activities of Rh and RhPt nanoparticles embedded in a nanoreactor with free‐standing and surface‐adsorbed nanoparticles reveals