Palladium(0)-Catalyzed Enantioselective Construction of Multifunctional Piperidine Derivatives from 1,3-Dienes, <i>N</i>-Cyano Imines, and Beyond
作者:Jian Zhang、Yuan Hu、Tian-Ying Zhang、Zhi-Chao Chen、Wei Du、Ying-Chun Chen
DOI:10.1021/acs.orglett.3c03261
日期:2023.11.17
An enantioselective (4 + 2) reaction between 1,3-dienes and N-cyano imines has been developed under Pd(0) catalysis, proceeding through a cascade vinylogous addition and intramolecular allylic amination sequence. 2,6-cis-Disubstituted-1,2,3,6-tetrahydropyridines were furnished as single diastereomers in moderate to good yields and enantiocontrol. Moreover, a more challenging three-component (2 + 2
在 Pd(0) 催化下,通过级联插烯加成和分子内烯丙胺化序列,开发了 1, 3-二烯和N-氰基亚胺之间的对映选择性 (4 + 2) 反应。2,6-顺式-二取代-1,2,3,6-四氢吡啶以单一非对映体形式提供,具有中等至良好的产率和对映体控制。此外,有效地实现了更具挑战性的1,3-二烯、 N-氰基亚胺和活化烯烃的三组分(2 + 2 + 2)环化,以提供具有高结构复杂性的哌啶,尽管具有中等对映选择性。