在中性反应条件下,用H 2 O 2进行的第一次锰催化的有机硅烷氧化为硅烷醇。可以耐受具有烷基,芳基,炔基和杂环取代基的多种有机硅烷,以及受阻位有机硅烷。氧化似乎是通过涉及氢过氧化锰物质的协同过程进行的。该方案具有温和的反应条件,快速的氧化作用,并且没有废副产物,可实现硅烷醇和硅烷二醇的低成本,生态友好的合成。
Reaction Progress Kinetics Analysis of 1,3-Disiloxanediols as Hydrogen-Bonding Catalysts
作者:Kayla M. Diemoz、Jason E. Hein、Sean O. Wilson、James C. Fettinger、Annaliese K. Franz
DOI:10.1021/acs.joc.7b00875
日期:2017.7.7
reaction progress kineticanalysis (RPKA) has been performed to probe the catalyst behavior of 1,3-disiloxanediols. The data confirm that the disiloxanediol-catalyzed addition reaction is first order in catalystover all concentrations studied with no evidence of catalyst self-association. 1,3-Disiloxanediols proved to be robust and recoverable catalysts with no deactivation under reaction conditions
作者:Judith Biedermann、H. Martin R. Wilkening、Frank Uhlig、Ilie Hanzu
DOI:10.1016/j.elecom.2019.03.010
日期:2019.5
In the past, the electrochemicalproperties of organosilicon compounds were investigated for both fundamental reasons and synthesis purposes. Little is, however, known about the electrochemical behaviour of hydrogen-bearing arylsilanes. Here, we throw light on the electrochemicalproperties of 11 arylsilanes compounds, 2 of them synthesized for the first time. The oxidation potentials are found to
Convenient route to di- and triorganosilyl ethyl ethers and the corresponding di- and triorganosilanes
作者:James M. Tour、Jens A. John、Erie B. Stephens
DOI:10.1016/0022-328x(92)83181-g
日期:1992.5
alkyl- and aryllithium reagents for the preparation of organosilyl ethyl ethers of the type R3SiOEt, R2R′SiOEt, and R2Si(OEt)2, that can be reduced to the organosilanes R3SiH, R2R′SiH, and R2SiH2, respectively. Compounds of the type RR′R′SiOEt cannot be cleanly formed. The reduction procedure involves treatment of the silyl alkoxy ethers with diisobutylaluminium hydride (DIBALH) and hydrolysis of the remaining
Hypervalent silicon hydrides: evidence for their intermediacy in the exchange reactions of di- and tri-hydrogenosilanes catalysed by hydrides (NaH, KH and LiAlH4)
RR′SiH2 and RSiH3 (R = aryl, allyl or benzyl; R′ aryl or alkyl), readily undergo exchange reactions, involving siliconcarbon bonds and silicon-hydrogen bonds, in the presence of hydrides (LiAlH4, KH and NaH) as catalysts. These results are discussed in terms of five-coordinate siliconhydrides as intermediates in the reaction.
Novel aryl-substituted silanes Part II: Synthesis and characterization of diaryl silicon dihydrides
作者:Judith Binder、Roland C. Fischer、Michaela Flock、Hans-Georg Stammler、Ana Torvisco、Frank Uhlig
DOI:10.1080/10426507.2015.1094657
日期:2016.3.3
GRAPHICAL ABSTRACT ABSTRACT A series of novel and previously published silicon dihydrides, R2SiH2 (R = benzyl, fluorenyl, p-tolyl, p-n-butyl, p-biphenyl, m-tolyl, o-tolyl, 2,4-xylyl, 2,6-xylyl, p-biphenyl, 1-naphthyl, 9-anthracenyl), were synthesized and characterized using 1H, 13C, and 29Si NMR spectroscopy. Effects of substituent bulk on 29Si NMR shifts are compared between reported silicon dihydrides