Synthesis of C3,C4-Disubstituted Indoles via the Palladium/Norbornene-Catalyzed <i>ortho</i>-Amination/<i>ipso</i>-Heck Cyclization
作者:Alexander J. Rago、Guangbin Dong
DOI:10.1021/acs.orglett.1c01165
日期:2021.5.7
Herein, we report the synthesis of C3,C4-disubstituted indoles via the palladium/norbornene cooperative catalysis. Utilizing N-benzoyloxy allylamines as the coupling partner, a cascade process involving ortho-amination and ipso-Heck cyclization takes place with ortho-substituted aryl iodides to afford diverse indole products. The reaction exhibits good functional group tolerance, in addition to tolerating
在此,我们报道了通过钯/降冰片烯协同催化合成C3,C4-二取代吲哚。利用N-苯甲酰氧基烯丙胺作为偶联伙伴,与邻位取代的芳基碘化物发生涉及邻位胺化和原位Heck环化的级联过程,以提供多种吲哚产物。该反应除了耐受吲哚氮上的可去除保护基团外,还表现出良好的官能团耐受性。使用含有更多取代烯烃的烯丙胺偶联伴侣观察到不同的反应性。丝裂霉素核心框架的构建也已尝试采用该策略。