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
构象非刚性无环酮烯醇化物的 Pd 催化不对称烯丙基烷基化的第一个例子报告了出色的产率、区域选择性和对映选择性。烯醇碳酸酯的双键几何结构影响其反应性、选择性以及产物的绝对构型。观察到与烯醇化物直接攻击 π-ally-Pd 复合物的烯丙基部分所预测的相反的对映选择性。提出了另一种机制,它涉及将烯醇化物与 Pd 协调的内球过程,然后进行还原消除。