发现苯并[ d ]异恶唑可作为新型亲核试剂与金酰胺进行金催化的[5 + 1]或[5 + 2]环加成反应。该反应提供了对多取代的2 H-苯并[ e ] [1,3]恶嗪或苯并[ f ] [1,4]氧杂ze子的简明和化学选择性的途径。另外,苯并[ d ]异恶唑也可以与衍生自炔丙基酯的金卡宾中间体反应,得到[5 +1]环化产物。
Benzisoxazole core and benzoxazolopyrrolidine via HDDA-derived benzyne with PTIO/DMPO
作者:Yu Lei、Wenjing Zhu、Yajuan Zhang、Qiong Hu、Jie Dong、Yimin Hu
DOI:10.1016/j.cclet.2022.107778
日期:2023.4
This research described a simple and efficient pathway for the synthesis of benzisoxazoles from arynes and PTIO (2-phenyl-4,4,5,5-tetramethylimidazoline-3-oxide-1-oxyl), C−C and C−O bonds were formed in a single step without catalyst under mild conditions. The unexpected cleavage of C−N bond contributed to the formation of isoxazolering, as indicated by DFT studies. Furthermore, we obtained the structure