Chiral α-Amino Acid/Palladium-Catalyzed Asymmetric Allylation of α-Branched β-Ketoesters with Allylic Amines: Highly Enantioselective Construction of All-Carbon Quaternary Stereocenters
作者:Ya-Nan Xu、Meng-Zeng Zhu、Shi-Kai Tian
DOI:10.1021/acs.joc.9b02282
日期:2019.11.15
use of allylic amines as allylating agents in the chiral α-amino acid/palladium-catalyzed asymmetric allylation of α-branched β-ketoesters, providing highly enantioselective access to all-carbon quaternary stereocenters. Notably, the formation of a primary amine, a secondary amine, or ammonia as a byproduct has little influence on the enantioselectivity for the catalytic asymmetric synthesis of structurally
已经开发出一种新的协议,用于将烯丙基胺用作α-支链β-酮酸酯的手性α-氨基酸/钯催化的不对称烯丙基化中的烯丙基化剂,从而提供了对映全碳全季铵立体中心的高度对映选择性。值得注意的是,作为副产物的伯胺,仲胺或氨的形成对结构多样的α,α-二取代的β-酮酯的催化不对称合成的对映选择性几乎没有影响。