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
Facile synthesis of substituted quinolines by iron(<scp>iii</scp>)-catalyzed cascade reaction between anilines, aldehydes and nitroalkanes
作者:Sachinta Mahato、Anindita Mukherjee、Sougata Santra、Grigory V. Zyryanov、Adinath Majee
DOI:10.1039/c9ob01294j
日期:——
A library of substituted quinolines has been synthesized by the reaction of aldehydes, anilines and nitroalkanes using a catalytic amount of Fe(iii) chloride. The reaction is a simple, efficient, one-pot, three-component domino strategy in ambient air which afforded the products in high yields. A probable pathway of the reaction is a sequential aza-Henry reaction/cyclization/denitration. The use of
efficient copper-catalyzed intermolecular decarboxylative cascade cyclization has been developed that uses readily accessible starting materials and less-expensive reagents. A one-pot reaction of an aryl aldehyde, an aniline, and acrylic acid permits the direct synthesis of 2-substituted quinolines through the sequential formation of C–N and C–C bonds. Furthermore, the three-component, one-pot, domino