KIO<sub>3</sub>-Catalyzed Aerobic Cross-Coupling Reactions of Enaminones and Thiophenols: Synthesis of Polyfunctionalized Alkenes by Metal-Free C–H Sulfenylation
The synthesis of polyfunctionalized aminothioalkenes has been realized via the direct C–H sulfenylation of enaminones and analogous enamines. These cross-coupling reactions have been achieved by simple KIO3 catalysis under aerobic conditions without employing any transition metal catalyst or additional oxidant. The employment of bio-basedgreensolventethyllactate as the reaction medium constitutes
Iodine(III)-Promoted Ring Contractive Cyanation of Exocyclic β-Enaminones for the Synthesis of Cyanocyclopentanones
作者:Dhananjay Bhattacherjee、Vandna Thakur、Saurabh Sharma、Sandeep Kumar、Richa Bharti、C. Bal Reddy、Pralay Das
DOI:10.1002/adsc.201601208
日期:2017.7.3
A highly efficient hypervalent iodine‐promoted regiocontrolled ring contractive cyanation (RCC) reaction of exocyclic β‐enaminones for the synthesis of cyanocyclopentanone (CCP) was demonstrated at ambient temperature with a wide substrate scope. The methodology offers a facile technique to construct an amino carbonitrile‐containing quaternary stereocenter at the α‐position of cyclopentanone in good
Lactic acid-catalyzed fusion of ninhydrin and enamines for the solvent-free synthesis of hexahydroindeno[1,2-<i>b</i>]indole-9,10-diones
作者:Xuwen Chen、Yunyun Liu
DOI:10.1515/hc-2016-0048
日期:2016.6.1
Abstract
The lactic acid-catalyzed reactions of ninhydrin and secondary enaminones were conducted by solvent-free grinding at room temperature to yield polycyclic 4b,9b-dihydroxy-4b,5,6,7,8,9b-hexahydroindeno[1,2-b]indole-9,10-diones.
Hypervalent Iodine-Promoted Aromatization of Exocyclic β-Enaminones for the Synthesis of <i>meta</i>
-<i>N</i>
,<i>N</i>
-Diarylaminophenols
作者:Dhananjay Bhattacherjee、Vandna Thakur、Arun K. Shil、Pralay Das
DOI:10.1002/adsc.201700004
日期:2017.7.3
cascade approach for the synthesis of meta‐N,N‐diarylaminophenols (DAAP) starting from exocyclic β‐enaminones has been developed. The feasibility of the process is rationalized by the suitable molecular geometry of β‐enaminones for tandem N‐arylative α‐iodination and aromatization under milder basic conditions. Furthermore, the developed strategy has been extended to the synthesis of meta‐N‐benzyl‐N‐arylaminophenols
Highly Regioselective and Chemoselective [3 + 3] Annulation of Enaminones with <i>ortho-</i>Fluoronitrobenzenenes: Divergent Synthesis of Aposafranones and Their <i>N</i>-Oxides
regioselective and chemoselective divergent synthesis of highly functionalized aposafranones and their N-oxides has been developed from the [3 + 3] annulation of enaminones with o-fluoronitrobenzenenes. This novel synthetic strategy offers an alternative method for the construction of aposafranones and their N-oxides are meaningful in the fields of both biology and organic synthesis. The established