Aerobic Copper-Catalyzed Intramolecular Cascade Oxidative Isomerization/[4+4] Cyclization of 2,2′-Disubstituted Stilbenes
作者:Zhi-Jun Zhang、Xu Zhou、Dashan Li、Yang Chen、Wen-Wen Xiao、Rong-Tao Li、Li-Dong Shao
DOI:10.1021/acs.joc.1c00656
日期:2021.6.4
through a sequence of rapid single-electron oxidation/[4+4] cyclization from 2,2′-disubstituted stilbene. The antarafacial manner of the thermally allowed [4+4] cyclization was further proven by series of control experiments and density functional theory calculations. Our findings provide an important addition to the aerobic copper-catalyzed oxidative cyclization.
描述了 2,2'-二取代芪的有氧铜催化级联氧化异构化/[4+4] 环化。在温和的 CuCl/DBED/空气催化体系下,通过烯烃的双官能化以高度原子经济的方式有效地制备了各种含 5,10-杂原子的四氢茚[2,1- a ]茚。机理研究表明,双环产物可能是通过 2,2'-二取代二苯乙烯的一系列快速单电子氧化/[4+4] 环化形成的。通过一系列控制实验和密度泛函理论计算进一步证明了热允许 [4+4] 环化的反面方式。我们的发现为有氧铜催化的氧化环化提供了重要补充。