Platinum-catalyzed Generation of Silylenes from Hydrodisilanes and Their Addition to α,β-Unsaturated Ketones
作者:Kazuhiro Okamoto、Tamio Hayashi
DOI:10.1246/cl.2008.108
日期:2008.1.5
The reaction of hydrodisilanes with α,β-unsaturated ketones in the presence of a platinum catalyst gave high yields of oxasilacyclopentenes, which are probably formed by the addition of silylenes to the enones. Treatment of the oxasilacyclopentenes with methyllithium followed by hydrolysis gave the corresponding β-silyl ketones.
Conjugate Additions of a Simple Monosilylcopper Reagent with Use of the CuI·DMS Complex: Stereoselectivities and a Dramatic Impact by DMS
作者:Jesse Dambacher、Mikael Bergdahl
DOI:10.1021/jo048269e
日期:2005.1.1
reagent with DMS as the solvent is very useful with stericallyhindered (β,β-disubstituted) enones, and provides very high yields of the β-silylated 1,4-addition products. Since there is no oligomerization problem associated with the simple monosilylcuprate reagent, this reagent should be considered as a very useful 1,4-silyl donor to enals, enones, and enoates in conjugate addition reactions.