Palladium-Catalyzed Decarboxylative Asymmetric Allylic Alkylation of Enol Carbonates
作者:Barry M. Trost、Jiayi Xu、Thomas Schmidt
DOI:10.1021/ja9053948
日期:2009.12.30
extended to a variety of cyclic or acyclic disubstituted allyl groups. Our mechanistic studies reveal that, similar to the direct allylation of lithium enolates, the DAAA reaction proceeds through an "outer sphere" S(N)2type of attack on the pi-allylpalladium complex by the enolate. An important difference between the DAAA reaction and the direct allylation of lithium enolates is that in the DAAA reaction
Palladium-Catalyzed Asymmetric Allylic α-Alkylation of Acyclic Ketones
作者:Barry M. Trost、Jiayi Xu
DOI:10.1021/ja055968f
日期:2005.12.1
of the conformationally nonrigid acyclic ketone enolates is reported with excellent yields, regioselectivity, and enantioselectivity. The double bond geometry of the allyl enol carbonates affects its reactivity, selectivity, as well as the absolute configuration of the products. An opposite enantioselectivity from what is predicted by a direct attack of the enolate on the allyl moiety of the π-ally−Pd