Magnesium-induced regiospecific C-silylation of suitably substituted enoates and dienoates
作者:Pintu K. Kundu、Sunil K. Ghosh
DOI:10.1016/j.tet.2010.09.001
日期:2010.10
cinnamates and β-silyl acrylates by a regiospecificreductive C-silylation using Mg/silyl chloride/DMF system at room temperature. These reductive C-silylation conditions have also been applied to δ-aryl substituted dienoates wherein silylation took place at the δ-position leading to the synthesis of single regioisomeric allylsilanes with very high stereoselectivity.
Electroreductive silylation of alpha, beta-unsaturated esters, nitriles and ketones in the presence of Me3SiCl using a reactive metal anode (Mg, Zn, Al) in an undivided cell afforded the corresponding beta-silyl compounds offering a valuable method for introduction of a silyl group into activated olefins.
Studies on the Silylation Reaction of α,β-Epoxy Esters Synthesized by Darzen's Condensation Reaction
Me3SiCl/Mg in HMPA was used for silylation of α,β-epoxy esters resulting in the corresponding β-silylated esters in a one pot reaction with reasonable yields.