Radical Borylative Cyclization of Isocyanoarenes with N-Heterocyclic Carbene Borane: Synthesis of Borylated Aza-arenes
作者:Yao Liu、Ji-Lin Li、Xu-Ge Liu、Jia-Qiang Wu、Zhi-Shu Huang、Qingjiang Li、Honggen Wang
DOI:10.1021/acs.orglett.1c00309
日期:2021.3.5
Borylated aza-arenes are of great importance in the area of organic synthesis. A radical borylative cyclization of isocyanoarenes with N-heterocyclic carbene borane (NHC-BH3) under metal-free conditions was developed. The reaction allows the efficient assembly of several types of borylated aza-arenes (phenanthridines, benzothiazoles, etc.), which are difficult to access using alternative methods. Mild
硼化的氮杂芳烃在有机合成领域中非常重要。开发了在无金属条件下用N-杂环卡宾硼烷(NHC-BH 3)进行的异氰基芳烃的自由基硼化环化反应。该反应可以有效组装几种类型的硼化氮杂芳烃(菲啶,苯并噻唑等),而使用其他方法难以接近。观察到温和的反应条件,良好的官能团耐受性和通常良好的效率。演示了这些产品的实用性,并讨论了其机理。