A Tandem Oxidative Annulation Strategy for the Synthesis of Tetracyclic 3-Spirooxindole Benzofuranones
作者:Chunxia Zhang、Min Liu、Mingruo Ding、Hao Xie、Fengzhi Zhang
DOI:10.1021/acs.orglett.7b01374
日期:2017.7.7
efficient method was developed for the construction of the medicinally important tetracyclic 3-spirooxindole benzofuranones. In this highly atom- and step-economical one-pot protocol, one quaternary carbon center, two new cycles, and four new bonds (C–C/C–O/C–N) were formed under simple ligand-free copper-catalyzed conditions through a novel tandem oxidative annulation strategy.
开发了一种简单有效的方法来构建具有医学重要性的四环3-螺氧并恶唑苯并呋喃酮。在这种高度原子和步骤经济的一锅方案中,在简单的无配体铜催化下形成了一个季碳中心,两个新环和四个新键(CC-C / C-O / C-N)通过新型串联氧化环化策略获得的条件。