Organocatalytic asymmetric conjugate addition of cyclic 1,3-dicarbonyl compounds to β,γ-unsaturated α-ketoesters
作者:Jin-jia Wang、Jin-hua Lao、Zhi-peng Hu、Rui-Jiong Lu、Shao-zhen Nie、Quan-sheng Du、Ming Yan
DOI:10.3998/ark.5550190.0011.922
日期:——
The conjugate addition of cyclic 1,3-dicarbonyl compounds to β,γ-unsaturated α-keto-esters was studied using a series of chiral bifunctional organocatalysts. Takemoto’s catalyst was found to be most efficient for this transformation. Excellent yields and good enantioselectivities were achieved for a variety of β,γ-unsaturated α-keto-esters and cyclic 1,3-dicarbonyl compounds. A bifunctional catalytic
使用一系列手性双功能有机催化剂研究了环状 1,3-二羰基化合物与 β,γ-不饱和 α-酮酯的共轭加成。竹本的催化剂被发现对这种转变最有效。各种 β,γ-不饱和 α-酮酯和环状 1,3-二羰基化合物均获得了优异的产率和良好的对映选择性。提出了一种双功能催化机制。该方法为手性香豆素衍生物提供了一条新的不对称合成路线。