Asymmetric synthesis catalyzed by chiral ferrocenylphosphine-transition metal complexes. 5. Palladium-catalyzed asymmetric allylation of active methine compounds
Asymmetric synthesis catalyzed by chiral ferrocenylphosphine-transition metal complexes. 5. Palladium-catalyzed asymmetric allylation of active methine compounds
Asymmetric Allylation of Unsymmetrical 1,3-Diketones Using a BINAP−Palladium Catalyst
作者:Ryoichi Kuwano、Kei-ichi Uchida、Yoshihiko Ito
DOI:10.1021/ol034665s
日期:2003.6.1
[reaction: see text] The chiral palladium complex generated in situ from [Pd(eta(3)-allyl)Cl](2) and (R)-BINAP is a good catalyst for the catalytic asymmetricallylation of 1,3-diketones. The reaction provided chiral 2,2-dialkyl-1,3-diketones with 64-89% ee in high yields (13 examples). Enantiomeric excesses are strongly affected by the gamma-substituent of the allylic substrates. A variety of unsymmetrical