Visible-light driven synthesis of polycyclic benzo[<i>d</i>][1,3]oxazocine from 2-aminochalcone
作者:Yu-Qi Gao、Yi Hou、Liming Zhu、Junhan Chen、Ruoxin Li、Sheng-Yong Zhang、Yu-Peng He、Weiqing Xie
DOI:10.1039/d0cc02416c
日期:——
Herein, we report a tandem cycloisomerization/nucleophilic addition/cyclization of 2-amino chalcone with bifunctional nucleophiles driven by visible light. This cascade process is realized by the irradiation of a blue LED at room temperature, which provides a concise route to structurally diverse benzo[d][1,3]oxazocine scaffolds. Mechanistic studies show that the reaction is initiated with the E to
在本文中,我们报告了2-氨基查尔酮与可见光驱动的双功能亲核试剂的串联环异构化/亲核加成/环化反应。这种级联过程是通过在室温下照射蓝色LED来实现的,这为结构上多样化的苯并[ d ] [1,3]恶唑啉骨架提供了一条简洁的途径。机理研究表明,反应是在可见光照射下,由C–C双键的E到Z异构化开始的,然后环化/再芳构化以生成瞬态喹啉中间体,该中间体被亲核试剂捕获并环化生成多环苯并[ d ] [1,3]恶唑啉。