Charge reversal of electrophilic .pi.-allylpalladium intermediates: carbonyl allylation by allylic acetates with tetrakis(triphenylphosphine)palladium-zinc
Diethylzinc‐Mediated Allylation of Carbonyl Compounds Catalyzed by [(NHC)(PR
<sub>3</sub>
)PdX
<sub>2</sub>
] and [(NHC)Pd(η
<sup>3</sup>
‐allyl)Cl] Complexes
作者:Alexandre Flahaut、Krimo Toutah、Pierre Mangeney、Sylvain Roland
DOI:10.1002/ejic.200900891
日期:2009.12
reaction was investigated with this complex. [(IMesMe)(PPh3)PdI2] catalyzes the allylation of aromatic (except 4-nitrobenzaldehyde) and aliphatic aldehydes (including enolizable aldehydes) with cinnamyl acetate to give the corresponding homoallylic alcohols in 57–98 % yields and diastereoselectivities ranging from 70:30 to 92:8. The allylation of acetone also takes place under the same conditions, leading
Charge reversal of electrophilic .pi.-allylpalladium intermediates: carbonyl allylation by allylic acetates with tetrakis(triphenylphosphine)palladium-zinc