Syntheses of 4-Indolylquinoline Derivatives via Reductive Cyclization of Indolylnitrochalcone Derivatives by Fe/HCl
作者:Wen-Chang Chen、Chan-Chieh Lin、Veerababurao Kavala、Chun-Wei Kuo、Chia-Yu Huang、Ching-Fa Yao
DOI:10.3390/molecules201219862
日期:——
procedure for the synthesis of 4-indolylquinoline derivatives is described. This process involves two steps, the first of which is the Michael addition of indole to nitrochalcones promoted by sulfamic acid under solvent free conditions and the second step is a reductive cyclization of the indolylnitrochalcone intermediates to 4-indolylquinoline derivatives by Fe/HCl in ethanol. In both steps, the reactions
Construction of highly functionalized carbazoles via condensation of an enolate to a nitro group
作者:Tej Narayan Poudel、Yong Rok Lee
DOI:10.1039/c5sc02407b
日期:——
This paper describes a novel synthesis of highly functionalized and diverse carbazoles via transition-metal-free and mild base-promoted condensations of readily available 2-nitrocinnamaldehyde or 2-nitrochalcones with various β-ketoesters or 1,3-diaryl-2-propanones. The method selectively forms four bonds by the intramolecular conjugate addition of an enolate to the enal or chalcone bearing an o-nitro