Dynamic Kinetic Asymmetric Transformation (DYKAT) by Combined Amine- and Transition-Metal-Catalyzed Enantioselective Cycloisomerization
作者:Gui-Ling Zhao、Farman Ullah、Luca Deiana、Shuangzheng Lin、Qiong Zhang、Junliang Sun、Ismail Ibrahem、Pawel Dziedzic、Armando Córdova
DOI:10.1002/chem.200902818
日期:2010.2.1
The first examples of one‐pot highly chemo‐ and enantioselective dynamic kinetic asymmetric transformations (DYKATs) involving α,β‐unsaturated aldehydes and propargylated carbon acids are presented. These DYKATs, which proceed by a combination of catalytic iminium activation, enamine activation, and Pd0‐catalyzed enyne cycloisomerization, give access to functionalized cyclopentenes with up to 99 % ee
给出了涉及α,β-不饱和醛和炔丙基化碳酸的一锅高化学和对映选择性动态动力学不对称转化(DYKAT)的第一个例子。这些DYKAT通过催化亚胺活化,烯胺活化和Pd 0催化的烯炔环异构化的结合而进行,可得到具有高达99%ee的官能化环戊烯, 并可用于生成全碳四元立体中心。