Catalytic Asymmetric Umpolung Tandem Reactions of Hemiacetals via Dinuclear Zinc Cooperative Catalysis
作者:Sheng-Nan Xing、Yuan-Zhao Hua、Xiao-Chao Yang、Si-Si Du、Shi-Kun Jia、Guang-Jian Mei、Min-Can Wang
DOI:10.1021/acs.orglett.2c00913
日期:2022.6.10
The umpolung activity of hemiacetals serving as α-carbon nucleophiles has been reported via dinuclear zinc cooperative catalysis. This umpolung strategy has been applied to catalytic asymmetric tandem reactions of 1-tosylindoline-2,3-diols with β,γ-unsaturated-α-keto compounds, providing a broad series of structurally diverse tetrahydrofuran spirooxindoles and dihydrofurans, respectively. In addition
已通过双核锌协同催化报道了作为 α-碳亲核试剂的半缩醛的 umpolung 活性。这种 umpolung 策略已应用于 1-tosylindoline-2,3-二醇与 β,γ-不饱和-α-酮化合物的催化不对称串联反应,分别提供了一系列结构多样的四氢呋喃螺氧吲哚和二氢呋喃。此外,产品可以转化为喹唑啉和喹啉衍生物。