Pentane-2,4-dione with allylic alcohols or benzyl alcohol with palladium catalysts gives high yields of C-monoalkylated diketones, arising mainly from reaction at the terminal end of the allyic system for alkyl monosubstituted allyl alcohols. The effect of the catalyst on the alcohols has been evaluated; rearrangements and disproportionations have been observed.
Influence du cuivre sur la substitution des énolates stables par divers halogénures allyliques
作者:Thérèse Cuvigny、Marc Julia
DOI:10.1016/s0022-328x(00)98920-4
日期:1987.9
The allylic substitution, by a variety of allylic halides, of stable enolates derivedfrom diethyl malonate, ethyl cyanoacetate, ethyl acetoacetate and acetylacetone has been investigated. The yields and regioselectivity of these reactions are strongly influenced by cuprous ions (and their ligands).