Cobalt-catalyzed oxidative [3 + 2] cycloaddition reactions: an efficient synthesis of pyrrolo- and imidazo-[2,1-a]isoquinolines
作者:Chengtao Feng、Ji-Hu Su、Yizhe Yan、Fengfeng Guo、Zhiyong Wang
DOI:10.1039/c3ob41424h
日期:——
A cobalt-catalyzed oxidative [3 + 2] cycloaddition cascades of dihydroisoquinoline esters with nitroolefins or N-sulfuryl aldimines were developed at room temperature. A multi-component reaction for the synthesis of 5,6-dihydroimidazo[2,1-a]isoquinolines were also realized under almost identical conditions. This method is particularly suitable for the synthesis of tricyclic nitrogen heterocycles due
在室温下开发了钴催化的二氢异喹啉酯与硝基烯烃或N-硫磺基醛亚胺的氧化[3 + 2]环加成级联反应。在几乎相同的条件下也实现了用于合成5,6-二氢咪唑并[2,1- a ]异喹啉的多组分反应。该方法操作简单,反应底物范围广,区域选择性好,因此特别适合于合成三环氮杂环。