Enantioselective Construction of 1<i>H</i>-Isoindoles Containing Tri- and Difluoromethylated Quaternary Stereogenic Centers via Palladium-Catalyzed C–H Bond Imidoylation
作者:Jian Wang、Lianjie Li、Minxue Chai、Shumin Ding、Jing Li、Yongjia Shang、Haixia Zhao、Dan Li、Qiang Zhu
DOI:10.1021/acscatal.1c03682
日期:2021.10.1
enantioselective synthesis of 1H-isoindoles containing tri- and difluoromethylated quaternary stereogenic centers through a palladium-catalyzed desymmetric C–H bond imidoylation has been developed. α,α-Diaryl tri- and difluoroethylated isocyanides acted as powerful precursors of chiral 1H-isoindoles, in which the fluoroalkyl group was proven to play a crucial role in both the stereochemistry and reaction efficiency
已经开发了一种通过钯催化的去对称 C-H 键亚胺酰化作用合成含有三和二氟甲基化季立体中心的 1 H-异吲哚的分子间对映选择性合成。α,α-二芳基三和二氟乙基化异氰化物是手性 1 H-异吲哚的强大前体,其中氟烷基被证明在立体化学和反应效率中都起着至关重要的作用。此外,实现了丙二烯插入级联,可快速获得具有良好产率和高对映选择性的各种 C1 系链双杂环支架。反应在温和条件下顺利进行,催化剂负载量低。