Rh-Catalyzed annulations of N-methoxybenzamides with ketenimines: synthesis of 3-aminoisoindolinones and 3-diarylmethyleneisoindolinones with strong aggregation induced emission properties
作者:Xiaorong Zhou、Zhixing Peng、Hongyang Zhao、Zhiyin Zhang、Ping Lu、Yanguang Wang
DOI:10.1039/c6cc05456k
日期:——
Rhodium-catalyzed C–H activation/annulation reactions of ketenimines with N-methoxybenzamides furnished 3-aminoisoindolin-1-ones and 3-(diarylmethylene)isoindolin-1-ones.
The reaction of N-aryl-substituted ketenimines with N,N-disubstitutedcyanamides or (MeS)2C=N-CN under high pressure afforded 4-(N,N-disubstituted amino) or 4-(MeS)2C=N-substituted quinazoline derivatives, respectively. These products were formed by [4+2] cycloaddition between the aza-diene moieties of the N-arylsubstituted ketenimines and cyano groups. A 4-(unsubstituted amino)quinazoline derivative
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。
Lewis acid catalyzed [3 + 2] annulation of ketenimines with donor–acceptor cyclopropanes: an approach to 2-alkylidenepyrrolidine derivatives
The [3 + 2] annulation reaction of C,C,N-trisubstituted ketenimines with donor–acceptorcyclopropanes bearing aryl, styryl and vinyl substituents at the C2 position, triggered by the Lewisacid Sc(OTf)3, supplies highly substituted pyrrolidines. Activated cyclopropanes fused to naphthalene and [1]benzopyrane nuclei are also suitable substrates in similar transformations, yielding partially saturated
由路易斯酸Sc(OTf)3引发的C,C,N-三取代的酮亚胺与供体-受体环丙烷在C2位置带有芳基,苯乙烯基和乙烯基取代基的[3 + 2]环化反应提供了高度取代的吡咯烷。与萘和[1]苯并吡喃核融合的活化环丙烷也是类似转化的合适底物,产生部分饱和的苯并[ g ]吲哚和[1]苯并吡喃[4,3- b ]吡咯。还开发了这种酮亚胺/环丙烷[3 + 2]环糊剂的分子内版本,从而形成了吡咯并[2,1- a ]异吲哚骨架。
One-component one-pot multi-annulation by anodic oxidation of aryl substituted ketene imines (vinylideneamines)
作者:James Y. Becker、Elias Shakkour、J. A. R. P. Sarma
DOI:10.1039/c39900001016
日期:——
The one-potone-component unique electrochemical synthesis of tetra- and bi-heterocycles by anodicoxidation of aryl-substituted keteneimines is described; the X-ray crystal structure of one of the heterocyclic products is presented.