Regio- and stereoselectivity in the addition of metal n,n-dimethylphenylacetamide enolates to some conjugated carbonyl compounds
作者:Y. Stefanovsky、Tz. Gospodova、L. Viteva
DOI:10.1016/s0040-4020(01)82085-8
日期:1986.1
bromomagnesium N,N-dimethylphenylacetamide enolates to cinnamic aldehyde, chalcone and methyl cinnamate is studied. The regioselectivity of the reaction is found to depend on the metal counter ion and other reaction conditions. The stereoselectivity under kinetic and thermodynamic conditions does not depend on the metal. The reactivity of the amide-enolates is compared with the reactivity of other enolates already
First examples of lithium reagents addition in cyanine dyes series
作者:Lilia Viteva、Yuri Stefanovski、Tzveta Gospodova、Marie Rose Mazières、Jean Gérard Wolf
DOI:10.1016/s0040-4039(00)00205-7
日期:2000.4
The reactivity of the cyaninedyes towards nucleophilic reagents is currently being tested. As in the case of phosphine derivatives, carbanions attack the electrophilic C3 carbon of the pentamethine chain to give, with a good yield, new functionalized podands with cyano, keto, amino, amido, or enol-ether moieties.