Rh-Catalyzed annulations of N-methoxybenzamides with ketenimines: synthesis of 3-aminoisoindolinones and 3-diarylmethyleneisoindolinones with strong aggregation induced emission properties
Rh-Catalyzed annulations of N-methoxybenzamides with ketenimines: synthesis of 3-aminoisoindolinones and 3-diarylmethyleneisoindolinones with strong aggregation induced emission properties
Preparation of Benzo[<i>c</i>]carbazol-6-amines via Manganese-Catalyzed Enaminylation of 1-(Pyrimidin-2-yl)-1<i>H</i>-indoles with Ketenimines and Subsequent Oxidative Cyclization
作者:Xiaorong Zhou、Zhenmin Li、Zhiyin Zhang、Ping Lu、Yanguang Wang
DOI:10.1021/acs.orglett.8b00204
日期:2018.3.2
Manganese-catalyzed C2–H enaminylation of 1-(pyrimidin-2-yl)-1H-indoles with ketenimines is reported. The reaction provided 2-enaminylated indole derivatives in moderate to excellent yields with a broad substrate scope. A migration of the directing group pyrimidinyl occurred during this process. The synthesized 2-enaminyl indoles could be conveniently converted into 5-aryl-7H-benzo[c]carbazol-6-amines
据报道,用酮亚胺对锰催化的1-(嘧啶-2-基)-1 H-吲哚的C 2 -H烯化作用。该反应以中等至优异的产率提供了2-烯丙基化的吲哚衍生物,具有广泛的底物范围。在该过程中发生了导向基嘧啶基的迁移。合成的2-烯丙基吲哚可以方便地转化为5-芳基-7 H-苯并[ c ]咔唑-6-胺。
[4 + 2] Cycloaddition Reaction of <i>C</i>-Aryl Ketenimines with PTAD as a Synthetic Equivalent of Dinitrogen. Synthesis of Triazolocinnolines and Cinnolines
C,C,N-Triaryl ketenimines and C-alkyl-C,N-diaryl ketenimines react with 2 equiv of PTAD to provide 1,2,4-triazolo[1,2-a]cinnolines with a pendant triazolidindione group by means of a Diels-Alder/ene sequence. The treatment of such adducts with potassium hydroxide affords 3-aminocinnolines.