ProPhenol Derived Ligands to Simultaneously Coordinate a Main‐Group Metal and a Transition Metal: Application to a Zn−Cu Catalyzed Reaction
作者:Barry M. Trost、Guoting Zhang、Minghao Xu、Xiaotian Qi
DOI:10.1002/chem.202104268
日期:2022.2.16
A new bi-functional ligand bearing chiral N-heterocyclic carbene (NHC) and prolinol moieties is designed and applied in the generation of a Cu/Zn hetero-bimetallic complex, which unlocks the asymmetric allylic alkylation reactions of allyl phosphates with zinc keto-homoenolates generated from cyclopropanols, leading to the formation of various γ-vinyl ketones with good regio- and enantio-selectivity
设计了一种新的带有手性 N-杂环卡宾(NHC) 和脯氨醇部分的双功能配体,并应用于生成 Cu/Zn 杂双金属配合物,从而解锁了磷酸烯丙酯与酮基高烯醇锌的不对称烯丙基烷基化反应由环丙醇生成,导致形成具有良好区域选择性和对映选择性的各种 γ-乙烯基酮。DFT 计算支持烯丙基磷酸酯与催化剂的螯合促进了 S N 2' 的添加,并且配体-底物空间相互作用解释了立体选择性结果。