Oxidative Cycloaddition of 1,1,3,3-Tetramethyldisiloxane to Alkynes Catalyzed by Supported Gold Nanoparticles
作者:Ioannis N. Lykakis、Androniki Psyllaki、Manolis Stratakis
DOI:10.1021/ja2045502
日期:2011.7.13
nanoparticles supported on TiO(2) (0.1-1% mol) catalyze at roomtemperature and at extremely mild conditions the unprecedented oxidative cycloaddition of 1,1,3,3-tetramethyldisiloxane to alkynes, forming substituted 2,5-dihydro-1,2,5-oxadisiloles, with concomitant evolution of hydrogen gas. For the majority of the substrates, the yields are exceptional (up to 99%). The reaction proceeds at room temperature
Gold-Catalyzed Dehydrogenative Cycloaddition of Tethered 1,<i>n</i>-Dihydrodisilanes to Alkynes
作者:Vasiliki Kotzabasaki、Ioannis N. Lykakis、Charis Gryparis、Androniki Psyllaki、Eleni Vasilikogiannaki、Manolis Stratakis
DOI:10.1021/om3011678
日期:2013.1.28
5-hexamethyltrisiloxane (4), and 1,2-bis(dimethylsilyl)benzene (5), to alkynes, forming cycloadducts and releasing H2. Under the same conditions, polymeric methylhydrosiloxane is completely unreactive. For the majority of terminal alkynes and 1,n-dihydrodisilanes the yields are excellent (up to 99%). In general, terminal alkynes are more reactive as compared to internal. The reaction tolerates several