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.
Solvent-Controlled Highly Selective Bis- and Monoallylation of Active Methylene Compounds by Allyl Acetate with Palladium(0) Nanoparticle
作者:Brindaban C. Ranu、Kalicharan Chattopadhyay、Laksmikanta Adak
DOI:10.1021/ol702099v
日期:2007.10.1
catalyst for the allylation of active methylene compounds. Very efficient bisallylation is achieved for a variety of active methylene compounds by allyl acetate and itsderivatives in one stroke in THF solvent. The reaction in water provides monoallylated product selectively by allyl acetate only. The recovered Pd(0) nanoparticle is recycled. A probable mechanism is suggested.