Rhodium-Catalyzed Dehydrogenative Annulation of <i>N</i>-Arylmethanimines with Vinylene Carbonate for Synthesizing Quinolines
作者:Yan Hu、Jiang Nan、Jiacheng Yin、Guanjie Huang、Xin Ren、Yangmin Ma
DOI:10.1021/acs.orglett.1c03231
日期:2021.11.5
Here we report a novel Rh-catalyzed C−H/C−H alkenylation of N-arylmethanimines with vinylenecarbonate acting as a vinylene unit. Forty examples of C3,C4-nonsubstituted quinolines were achieved from commercially available starting materials. This identified process features an exceedingly simple system, a lower loading of catalyst, and the capacity for postfunctionalization with bioactive molecules
An efficient and practical palladium-catalyzed aerobic oxidative approach to afford functionalized 2-substituted quinolines in moderate to good yields from readily available allylbenzenes with aniline is developed. The present annulation process has high functional-group tolerance and high atom economy, making it a valuable and practical method in synthetic and medicinal chemistry. Moreover, this transformation
effective one-pot Friedländer quinolinesynthesisfrom o-nitroarylcarbaldehydes and ketones or aldehydes was developed and the scope and limitations of the method were examined. The o-nitroarylcarbaldehydes were reduced to o-aminoarylcarbaldehydes with iron in the presence of a catalytic amount of aqueous hydrochloric acid; the amino compounds were then condensed in situ with ketones or aldehydes to form
In this Letter, a new version of the Friedländer synthesis of quinoline derivatives starting from 2-bromobenzaldehydes, aryl methyl ketones, and aqueous ammonia with copper-catalyzed amination as a key step is presented. Remarkable advantages of this new quinoline synthesis include commercially available and economical starting materials, simple operational process, and excellent efficiency.
Gold(I)-Catalyzed Unprecedented Rearrangement Reaction Between 2-Aminobenzaldehydes with Propargyl Amines: An Expedient Route to 3-Aminoquinolines
作者:Nitin T. Patil、Vivek S. Raut、Valmik S. Shinde、Gaddamanugu Gayatri、G. Narahari Sastry
DOI:10.1002/chem.201103668
日期:2012.4.27
aminoquinolines: A gold(I)‐catalyzed unprecedented rearrangementreaction between 2‐aminobenzaldehydes with propargyl amine was studied. The study provided, for the first time, direct access to 3‐aminoquinolines in one step starting from readily available starting materials (see scheme). Elegantly designed experiments were employed to unravel the mechanism of this unprecedented rearrangement, which are corroborated