Facile one-pot three-component synthesis of diverse 2,3-disubstituted isoindolin-1-ones using ZrO<sub>2</sub> nanoparticles as a reusable dual acid–base solid support under solvent-free conditions
A facileone-potthree-component protocol for the synthesis of a series of multi-functionalized 2,3-disubstituted isoindolin-1-ones has been developed using ZrO2 nanoparticles as a dual acid–base solid support under solvent-free conditions. The surface of the ZrO2 nanoparticles, which is embedded with active hydroxyl groups, oxyanions and Zr4+ ions, efficiently catalyses the condensation of 2-carboxybenzaldehyde
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
Synthesis of 7-hydroxy-6,7-dihydro-indole and 6′,7′-dihydro-3,7′-biindole derivatives from domino reactions of arylglyoxals or methyl ketones with enamines
作者:Xin-Mou Lu、Zhong-Jian Cai、Jian Li、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1039/c5ra09478j
日期:——
successfully synthesized in moderate to good yields by the dominoreactions of different arylglyoxals 1 with enamines 2 under catalyst-free conditions. 7-Hydroxy-2-aryl-6,7-dihydro-indol-4(5H)-ones 3 could also be prepared in moderate yields by the iodine-promoted one pot-two step reactions of methyl ketones 6 with enamines 2. The reaction of 3a with N-methyl indole 7a in the presence of PTSA afforded
Three-Component Domino Reactions for Regioselective Formation of Bis-indole Derivatives
作者:Li-Ping Fu、Qing-Qing Shi、Yu Shi、Bo Jiang、Shu-Jiang Tu
DOI:10.1021/co3001428
日期:2013.2.11
A microwave-assisted regioselective reaction dealing with arylglyoxal monohydrate, diverse N-aryl enaminones, and indoles to achieve 3,2′- and 3,3′-bis-indoles by varying a substituted indole substrate is reported. The 2-unsubstituted indoles resulted in the 3,2′-bis-indole skeleton, whereas indoles bearing a methyl or phenyl group at C2 led to the 3,3′-bis-indoles with simultaneous formation of three
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.