α,β-Functionalization of saturated ketones with anthranils via Cu-catalyzed sequential dehydrogenation/aza-Michael addition/annulation cascade reactions in one-pot
An efficient method to access functionalized quinolines from the readily available saturatedketones and anthranils have been explored. This one-pot cascade reaction involves the in situ generation of α,β-unsaturated ketones by the copper catalysed dehydrogenation of saturatedketones followed by the aza-Michael addition of anthranils and subsequent annulation.
An efficient 3-acylquinoline synthesis from acetophenones and anthranil<i>via</i>C(sp<sup>3</sup>)–H bond activation mediated by Selectfluor
作者:Yejun Gao、Robert C. Hider、Yongmin Ma
DOI:10.1039/c9ra01481k
日期:——
method for the synthesis of 3-functionalized quinolines from commercially available acetophenones and anthranil has been described. Selectfluor propels the C(sp3)–H bond activation of the acetophenones and aza-Michael addition of anthranil resulting in annulated 3-acylquinolines in moderate to high yields. DMSO acts not only as a solvent but also as a one carbon donor in the reaction.
Copper-catalyzed one-pot domino reactions <i>via</i> C–H bond activation: synthesis of 3-aroylquinolines from 2-aminobenzylalcohols and propiophenones under metal–organic framework catalysis
作者:Ha V. Dang、Hoang T. B. Le、Loan T. B. Tran、Hiep Q. Ha、Ha V. Le、Nam T. S. Phan
DOI:10.1039/c8ra05459b
日期:——
A Cu2(OBA)2(BPY) metal–organic framework was utilized as a productive heterogeneous catalyst for the synthesis of 3-aroylquinolines via one-pot dominoreactions of 2-aminobenzylalcohols with propiophenones. This Cu-MOF was considerably more active towards the one-pot dominoreaction than a series of transition metal salts, as well as nano oxide and MOF-based catalysts. The MOF-based catalyst was reusable
Regioselective three-component synthesis of 2,3-disubstituted quinolines <i>via</i> the enaminone modified Povarov reaction
作者:Yi Li、Xiaoji Cao、Yunyun Liu、Jie-Ping Wan
DOI:10.1039/c7ob02411h
日期:——
The regioselective construction of functionalized quinolines by the three-component reactions of enaminones, aldehydes and anilines is accomplished. Unlike conventional Povarov reactions employing terminal alkynes or alkenes as C3–C4 fragment sources which provide 2,4-disubstituted quinolines, the present method allows fast and regioselective formation of 2,3-disubstituted quinolines as a modified
Abstract A simple and straightforward protocol has been accomplished for synthesis of pyrazolo[3,4-b]pyridines by reacting 5-amino-1-phenyl-3-(trifluoromethyl)-1H-pyrazole-4-carbaldehyde (1) and β-enaminoketones (2) promoted by Iron(III)chloride. This protocol was also able to produce quinolines (5) by the reaction of O-nitrobenzaldehydes and β-enaminoketones. Simple reaction conditions, high compatibility