Copper-Catalyzed [5 + 1] Cyclization of <i>o</i>-Pyrrolo Anilines and Heterocyclic <i>N</i>-Tosylhydrazones for Access to Spiro-dihydropyrrolo[1,2-<i>a</i>]quinoxaline Derivatives
作者:Yan Long、Yun Wang、Yue-You Chen、Wen-Yong Han、Nan-Wei Wan、Wei-Cheng Yuan、Yong-Zheng Chen、Bao-Dong Cui
DOI:10.1021/acs.joc.1c02909
日期:2022.3.18
Cu-carbene generated in situ from heterocyclic N-tosylhydrazone precursors followed by a 1,2-H shift/oxidative cyclization cascade of N-ylides, has been described, smoothly generating the corresponding structurally various spiro-dihydropyrrolo[1,2-a]quinoxaline derivatives. Furthermore, the significance of this protocol can be also highlighted by its diverse conversions of the synthetic compounds to the potentially
已经描述了一种廉价的铜催化顺序反应过程,该过程通过胺亲核攻击从杂环N-甲苯磺酰腙前体原位产生的 Cu-卡宾,然后是N-叶立德的 1,2-H 位移/氧化环化级联。,顺利生成相应的结构上各种螺二氢吡咯并[1,2- a ]喹喔啉衍生物。此外, 该协议的重要性还可以通过其将合成化合物多种转化为潜在的生物活性分子 (如 2-取代的 pyrrolo[1,2- a ] 喹喔啉) 来突出。