Chiral N-Heterocyclic-Carbene-Catalyzed Cascade Asymmetric Desymmetrization of Cyclopentenediones with Enals: Access to Optically Active 1,3-Indandione Derivatives
作者:Jia-Ming Hu、Jun-Qi Zhang、Bing-Bing Sun、Jun-Bo Chen、Jie-Qiang Yu、Xiao-Peng Yang、Hao-Peng Lv、Zheng Wang、Xing-Wang Wang
DOI:10.1021/acs.orglett.9b03178
日期:2019.11.1
A chiral N-heterocyclic-carbene-catalyzed cascade asymmetric desymmetrization reaction of cyclopentenediones with enals has been successfully initiated, followed with tandem aldol annulation, aromatization, as well as sequential methylation. The reactions proceeded well under mild reaction conditions, with broad substrate scope and good functional group tolerance, providing a rapid access to highly
已成功地引发了手性N-杂环卡宾催化的环戊二烯与烯的级联不对称脱对称反应,随后进行了串联的羟醛化,芳构化和顺序甲基化。反应在温和的反应条件下进行得很好,具有广泛的底物范围和良好的官能团耐受性,可以快速进入中度到良好的高度官能化的手性2,2-二取代的1,3-茚满二酮衍生物,该衍生物包含全碳四元立体异构中心具有高对映选择性的产率。